Balloon Vine (Cardiospermum Halicacabum) 風船蔓(フウセンカズラ)

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The balloon vine (Cardiospermum halicacabum) is native to tropical and subtropical regions, came to Japan during the Meiji era (1868-1912), and is now grown for ornamental purposes across the country. As its name suggests, the balloon vine is known for its balloon shaped fruits but you shouldn't miss its tiny white flowers or dark brown seeds with heart-shaped white spots on them, which are so sweet (scroll down)!

When I was photographing the flowers, the owner came out to give me the seeds. I put them in a pot at home, hoping they come up. 

2026/7/14

Panicled Hydrangea (Hydrangea Paniculata) ノリウツギ(糊空木)

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The panicled hydrangea (Hydrangea paniculata) is native to east Asia and can be found across Japan. The hydrangea look to me resembling oakleaf hydrangea (Hydrangea quercifolia), so I often mistook the latter for panicled hydrangeas and this is my first time seeing the panicled one still in bloom. 

The panicled hydrangea's Japanese name is "nori utsugi," which translates into "glue Deutzia," after their inner bark being used before to make a natural adhesive for washi, i.e., Japanese paper, and their stems resembling those of Deutzia. 

2026/7/15

Yellow Spotted Stink Bug キマダラカメムシ(黄斑亀虫)

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Eggs of yellow spotted stink bugs (Erthesina fullo) hatch into nymphs as below. 

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Below is a record of 2025/6/12 I found their eggs for the first time.

On 12 June 2025 (scroll down), I found a circle the size of a quarter dollar coin on a leaf of Chinese tallow (3rd photo). Then, five days later (i.e., on 17 June), they'd become like in the 2nd photo and for the last day since then, they have changed like in the 1st photo! Every bug is small but you can clearly see each is a yellow spotted stink bug. They've changed not only their appearance but also have started to move. The one in the upper right of the 1st photo was running toward the backside of the leaf. They may not be there tomorrow, which makes me feel a bit sad and relieved a lot.   

P.S.
On 19 June 2025, I went there again to check up on them, finding them like in the 1st photo. All larvae are all gone but two on the eggs in the 1st photo and one each in the 2nd and 3rd photos.

2026/7/16

2026/7/15

Fig (Ficus Carica) イチジク(無花果)

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Fig (Ficus carica) is native to west Asia, came to Japan either in the 1590s through Father Diogo de Mesquita, a Portuguese Jesuit who came to Japan in the 16th century as a missionary, or in around 1630 through China. Its flowers are hidden, growing inside the pear-shaped structure. This is the origin of its Japanese name "無花果," which translates into "no flower fruit." A fig fruit, however, is actually not a fruit but inverted flowers😮.

2026/7/10

Plumbago Auriculata (Blue Plumbago) 瑠璃茉莉(ルリマツリ)

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Blue plumbago (Plumbago auriculata) is native to South Africa, was introduced to Japan during the Meiji era (1868-1912) for ornamental purposes, and can now be found across the country, producing blue and white flowers from May to November. 

2026/7/14

Japanese Camellia (Camellia Japonica) ツバキ(椿)

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A fruit of Japanese camellia. Japanese camellia blooms resemble sasanqua camellia blooms very much but their fruits do not. In autumn, this should look like chocolates.

2026/7/15

2023/11/6

Potato Vine (Solanum Laxum) ツルハナナス(蔓花茄子)

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The potato vine (Solanum laxum) is native to South America, came to Japan during the Taisho era (1912-1926) for ornamental purposes, and can now be found across Japan. Its Japanese name is "tsuru hana nasu," which translates into "vine flower eggplant," after the resemblance of its flowers to those of eggplants. Eggplant or potato? It's so confusing. 

2026/7/14

Loquat (Eriobotrya Japonica) 枇杷(ビワ)

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The loquat (Eriobotrya japonica) is native to China, came to Japan from the 6th to 8th century and is now grown in warm regions, such as Nagasaki and Chiba prefectures. The plant produces flowers from November to February and fruits from May to June. The fruits are orange and shaped like a Chinese lute or pipa (枇杷), which is why the plant is called "pipa" in Chinese while "biwa" in Japanese, both are written in the same Chinese characters but pronounced differently. Although the flowers are plain, the fruits are so orange, and sweet and juicy that the trees in my neighborhood produce many fruits every year but I've never had a chance to taste them.  

By the way, loquats always bring back fond memories of my childhood.

When I was a second-grader, I lived in a town in southern Japan where there were many wild Amanatsu orange and loquat trees. One day my baby brother and I decided to go on a loquat picnic - just the two of us. I got up early and prepared lunch boxes, and after breakfast, we left home for a place with many loquat trees a few kilometers away. As soon as we got there, we started picking these orange fruits, and after that, had lunch there while talking about the harvest that day, i.e., about 20 fresh big loquats, and brought them home.

Looking back, however, something is bugging me. Were these loquat trees wild? Might they be planted trees in a loquat farm? I remember a couple of people there staring at us, not saying anything.

Now I'm pretty sure that that was a loquat farm and they were loquat farmers who were kind and generous enough to let local kids pick the loquats they'd grown without saying anything. I no longer remember exactly where that was, but these orange round fruits always remind me of this small adventure.

2025/11/28

Scarab Beetle 黄金虫(コガネムシ)

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Scarab beetles are quite prevalent and familiar to people in Japan. Actually, there's a song titled "Scarab beetles are rich." The lyrics are based on the lyricist (Ujo Noguchi)'s childhood memories that cockroaches gather in rich people's houses as they're warm and have food and that at that time, cockroaches were called "kogane mushi," which translates into "scarab beetles" in English😆!

Scarab beetles can be highly destructive to lawn and gardens. The adults feed on foliage and flowers, while their underground larvae damage the root systems of turf grass, ornamental plants, and crops. Scarab beetles, however, are so beautiful and their sleeping posture is funnily acrobatic (scroll down). 

2026/7/12

Sphaerophoria ミナミヒメヒラタアブ(南姫扁虻)

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Philadelphia fleabane (Erigeron philadelphicus) is native to North America, came to Japan in around 1920, and can now be found across the country. Actually, the plant is so prevalent as a weed that they're called "binbo gusa" and "binbo giku" in Japanese, which translates into "poor plant" and "poor chrysanthemum" respectively in some areas in Japan. On a Philadelphia fleabane is a tiny hoverfly. It's so tiny but very beautiful. 

2026/7/12

Monk's Cress (Tropaeolum Majus) ナスタチウム/キンレンカ(金蓮花)

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I've been growing herbs recently but this is mainly to use them for cooking but I realize I can enjoy them aesthetically, so I put monk's cress and oregano flowers, and mint in a glass. 

2026/7/12

Small Branded Swift (Pelopidas Mathias) チャバネセセリ(茶羽挵)

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The small branded swift can be seen in east Asia and Oceania. The butterfly resembles the common straight swift very much but the small branded swift has white spots in a circle while the common straight swift (Parnara guttata) has such spots in a straight line. 

2026/7/12

Small Copper (Lycaena Phlaeas) ベニシジミ(紅小灰蝶)

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The small copper (Lycaena phlaeas) flies from March to November in Japan, so it's not unusual to see them but it was my first time to see them, not one but two! Their orange forewings caught my eye. The butterfly's coloration changes slightly across seasons; spring broods are typically brighter while summer ones become darker and more muted. I can't say for sure but one of them seems like a spring brood and the other a summer one. Scroll down to see the two together in a photo.  

2026/7/12

2026/7/12

Water Celery (Oenanthe Javanica) セリ

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The water celery (Oenanthe javanica) is native to east Asia and can be found across Japan, producing small white flowers in August. The plant is aromatic and edible in its entirety including the roots. One of my favorite recipes is ohitashi, i.e., boiling and seasoning them with bonito dashi stock and soy sauce.

2026/7/9

2026/7/9

Aromaticus (Plectranthus Amboinicus) アロマティカス

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The aromaticus (Plectranthus amboinicus) is primarily native to Southern and Eastern Africa and has been seen in Japan since the 2000s. I've taken an early morning walk for more than five years and this is my second time to find herbs growing wild on the sidewalk.   

The one I found for the first time was apple mints. I took several stems home and have planted them in a pot. The incredible resilience of herbs always makes me feel motivated and energized. 

2026/7/10

Asian Jumpseed (Persicaria Filiformis) ミズヒキ(水引)

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The Asian Jumpseed (Persicaria filiformis) is native to East, South, and Southeast Asia and can be found across Japan, producing tiny flowers from August to October. The plant has no petals instead has four sepals, of which three are red and the other is white. Its Japanese name is "mizuhiki," i.e., an ancient Japanese artform of knot-tying, most commonly used to decorate Japanese ceremonial envelopes.

2026/7/5

Japanese Bindweed ヒルガオと虫たち

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The Japanese bindweed (Calystegia pubescens) is native to east Asia and can be found across Japan, producing pale pink flowers from June to August, which attract a variety of bugs, e.g.,  common straight swift butterflies and a marmalade and other hoverflies, as shown in these pictures.  

2026/7/9

Lysimachia Clethroides (Gooseneck Loosestrife) 丘虎の尾(オカトラノオ)

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The gooseneck loosestrife (Lysimachia clethroides) is native to east Asia and can be found across Japan, producing white flowers from June to August. It's edible and used to be eaten in Japan as a famine plant (although it tastes bitter and astringent). The plant's Japanese name is "Okatora no o," which translates into "tiger tail growing on hills," after its flower spikes looking like tiger tails.  

2026/7/5 With a marmalade hoverfly

Fragrant Evening-Primrose (Oenothera Stricta) マツヨイグサ(待宵草)

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Fragrant evening-primrose (Oenothera stricta) is native to South America, was imported to Japan in the late 19th century, and can now be found across Japan. This evening-primrose resembles common evening-primrose (Oenothera biennis) very much with one easy-to-tell difference, i.e., fragrant evening primroses turn orange as they wither. The other flower in the pictures, which has turned orange, told me these were not common but fragrant evening primroses. 

2026/7/9

Blueberry ブルーベリー

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The blueberry is native to North America but can now be found across Japan, producing flowers from April to May and fruits from early June to early September in Japan. Surprisingly, Tokyo is the largest producer of blueberries in Japan. 

2026/7/9

Goji Berry (Lycium Chinense) クコ(枸杞)

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The goji berry (Lycium chinense) is native to east Asia and can be found across Japan, producing small pale purple flowers from summer to autumn. In Japan, the goji berry is known to be good for eye health, boost the immune system, reduce cellular inflammation, and help regulate blood sugar levels. I didn't know however (and was surprised) that such a plant can grow on the sidewalk in Central Tokyo. I'll definitely come back in autumn to photograph the berries. (I've never seen them before being dried.) 

2026/7/6

2026/7/6

Onidokoro (Dioscorea Tokoro) オニドコロ(鬼野老)

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The onidokoro (Dioscorea tokoro) is native to east Asia and can be found across Japan, producing tiny (about 5mm in diameter) cream green flowers from July to August. It's in the yam family but unlike other yams, the onidokoro's thick rhizome is extremely bitter and contains toxic compounds like dioscorine, making it generally inedible. 

2026/7/5

Lantana ランタナ(Before Revision: Common Nettle (Urtica dioica) 修正前:セイヨウイラクサ(西洋刺草))

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The common nettle (Urtica dioica) is native to Europe, temperate Asia, and western North Africa and now found worldwide but I didn't know it can grow in a sidewalk gutter like those in these photos in Central Tokyo. I have rhinitis, so I was considering buying a nettle seedling to grow it at home but not anymore!

P.S.

A few days later, I found flowers among the leaves, which made me realize they're not nettles but lantanas. Sorry for the confusion. 

2026/7/5

Double-Flowered Roses of Sharon 八重咲きの木槿

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The rose of Sharon (Hibiscus syriacus) produces single and double-flowered blooms. Single-flowered blooms are elegantly beautiful while double-flowered ones are gorgeous. I like both!

2026/7/1

Johnson Grass (Sorghum Halepense) セイバンモロコシ(西播蜀黍)

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Johnson grass or Johnsongrass (Sorghum halepense) is native to the Mediterranean region of Europe and Africa, parts of Western Asia, and the Middle East, came to Japan as an invasive plant in around 1945, and can now can be found across the country but Hokkaido (i.e., the northernmost part of Japan). I looked up the origin of the name, finding that the plant is named after an Alabama plantation owner, Colonel William Johnson, who introduced the plant to his farm in around 1840 as a prospective forage. Johnsongrass, however, has been found to become poisonous under stress (e.g., frost) and be toxic to livestock. 

Despite such hardiness and toxicity, however, Johnsongrass produces tiny and cute flowers.  

2025/6/29

Rose of Sharon (Hibiscus syriacus) 木槿(ムクゲ)

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The rose of Sharon (Hibiscus syriacus) is native to China, came to Japan at the beginning of the Heian period (794 to 1185), and can be found across Japan. The plant produces simple and double flowered white and pink flowers from July to October and its flowers are used for display at Japanese tea ceremonies in summer.  

2026/7/1

Asian Swallowtail (Papilio Xuthus) ナミアゲハ(並揚羽)

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The Asian swallowtail (Papilio xuthus) is found in Asia, Siberia and the Hawaiian Islands and can be found across Japan. Its female is known to have clearer blue areas in black bands on their hindwings, so most of those in these photos may be female. 

Butterflies usually close their wings when resting but are also known to open their wings to bask in the sun to warm their bodies, which gave me the moment to take these photos. 

2026/6/30

Five-Seeded Plume-Poppy (Macleaya Cordata) タケニグサ(竹似草)

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The five-seeded plume-poppy (Macleaya cordata) is native to China, Taiwan, and Japan and can be found across Japan. Its Japanese name is "takeni gusa," which translates into "plant similar to bamboo," after it having hollow stems like bamboos. 

The plant shows its beauty in various ways. Spindle shaped white things (scroll down) are buds. Things that look like sparklers are flowers, which contain beautiful thread shaped white stamens and orange pistils (scroll down). Its brown capsules are also beautiful. 

2026/7/1

Hydrangea Serrata Var. Yesoensis F. Cuspidata Cv. 四季咲き姫紫陽花(シキザキヒメアジサイ)

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These are Hydrangea serrata var. yesoensis f. cuspidata cv., a type of mountain hydrangea. Their Japanese name is "shikizaki hime ajisai," which translates into "hydrangea blooming all year round." As the name suggests, the hydrangeas bloom for a longer period, i.e., the six months from June to December (not throughout the year though). Another feature is that the blooms change color at different pace one by one, resulting in various shades of pink, blue and purple. 

Their blue and purple color is beautiful but their bluish, pinkish, and purplish sepia gradients evoke a sense of nostalgic beauty. (Scroll down!)

Below are the shots of various hydrangeas. Hope you enjoy them, too!

2023/5/28

2023/5/28

Antilles Mottlegill (Panaeolus Antillarum) ツヤマグソタケ(艶馬糞茸)

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It was great fun finding mushrooms that hadn't existed a few days earlier. They've just popped up for the past couple of days, during which it rained heavily due to a typhoon. Google Lens identifies them as antilles mottlegill (Panaeolus antillarum) but I'm not sure. 

Many mushrooms are safe to touch and eat (and tasty!) but some are not. In Japan, 30 to 70 people are treated for mushroom poisoning every year. The Japanese ministry of agriculture, forestry, and fishery has a website on 10 most typical poisonous mushrooms in Japan (in Japanese only).   

2026/6/30

East Asian Mallotus (Mallotus Japonicus) アカメガシワ(赤芽柏)

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East Asian mallotus (Mallotus japonicus) is native to East Asia and can be found across Japan. The tree is dioecious, producing male and female flowers on separate trees from June to July. The trees in this post are all female with female flowers, producing clusters of fruits and seeds (scroll down) in two months. The three to four branched red parts of the female flowers are stigmas.

2026/6/29

Buckwheat (Fagopyrum Esculentum) ソバ(蕎麦)

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The buckwheat (Fagopyrum esculentum) is native to southwestern China and grown in Hokkaido and other prefectures in Japan but it's unusual for it to grow on the sidewalk like this. The plant produces white and pink flowers twice a year in Japan, i.e., summer buckwheat, which flower from late June to early July, and autumn buckwheat, which flower from early September to mid-October. Those in these photos should be summer buckwheat.

Many tourists come to Japan to eat tempura, sushi, ramen, wagyu, etc., but when you want to give your stomach a break, I would recommend a soba noodle. When your stomach doesn't need a break, you can of course enjoy having a soba noodle with tempura on it (i.e., tempura soba) or a soba noodle together with oyako don (chicken and egg rice bowl) or katsu don (Japanese pork cutlet and egg rice bowl), both of which you should generally be able to have at most soba noodle restaurants. 

2026/6/28

Japanese Spirea (Spiraea Japonica) シモツケ(下野)

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The Japanese spirea (Spiraea japonica) is native to China, Korea, and Japan and can be found across Japan, producing pink flowers with a beautiful gradient from pale to bright pink from May to August. The plant is named "shimotsuke" in Japanese after the Shimotsuke province or the current Tochigi prefecture where the plant was found for the first time in Japan. Its autumn leaves are also beautiful (scroll down)!

2026/6/28

Dendropanax Trifidus 隠れ蓑(カクレミノ)

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The Dendropanax trifidus is native to east Asia and can be found across Japan. The tree produces male and hermaphrodite flowers from June to July and then fruits, which turn black purple in late autumn. 

Its Japanese name is "kakuremino," which translates into "invisibility cloak," after the leaf looking like Tengu's magic cloak, which makes the wearer invisible like Harry Potter's invisibility cloak. Tengu are a type of mischievous yokai (supernatural beings) appearing in Japanese folklore. Imagining Harry Potter wearing Tengu's cloak made me chuckle😆.

The Dendropanax trifidus leaves change generally from a lobed to an ovate shape but some aren't lobed or ovate, which makes it difficult to identify the tree.  

2026/6/27

2023/7/21

Lespedeza (Bush Clovers) 萩(ハギ)

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The bush clover is native to east Asia and can be found across Japan. It's known as an autumn plant in Japan and its Japanese name "hagi" is a kigo or a seasonal word or phrase associated with a particular season used in traditional forms of Japanese poetry for autumn, but bush clovers actually flower from July to September and I once found a tree flowering in December (scroll down).

Bush clovers are known to produce pink flowers but they also have white flowers (Lespedeza buergeri) and some (Lespedeza  japonica bailey cv. versicolor) produce pink and white flowers on the same tree. 

2026/6/27

Broadleaf Plantain (Plantago Major) セイヨウオオバコ(西洋大葉子)

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The broadleaf plantain (Plantago major) is native to Eurasia while the Chinese plantain (Plantago asiatica) is native to east Asia and both can now be found across Japan. The former is larger than the latter but otherwise they resemble each other very much, so I can't tell which those in these photos are. The Plantago major flowers in summer and the Plantago asiatica from April to September in Japan. When I took these pictures, most had no flowers but I found one with many tiny cream flowers drooping after rain. 
  
2026/6/26

Sawtooth Oak (Quercus Acutissima) クヌギ(櫟)

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The sawtooth oak (Quercus acutissima) is native to North East Asia and can be found across Japan. The tree is known for its acorns but its calybia and cupules are beautiful and so are its flowers, produced from April to May (scroll down), which always remind me of a "noren" or bead curtain hung at the entrance of many izakaya restaurants in Japan😆.     

By the way, the term "noren" has another meaning in Japan, that is, goodwill for accounting and tax purposes because noren, which often has a trade name on it, is believed to represent customers' trust and brand value. Noren or goodwill is generally amortized over 20 years or less under Japanese GAAP and 5 years for Japanese tax purposes but not amortized but impaired when devalued for IFRS purposes. Why so different?  

As a relatively conservative country, Japan has preferred to take a conservative approach that goodwill, i.e., value in excess of market value, should decline as time goes by. Japan also doesn't like an impairment test, which could be manipulated by the management. Which approach would you choose?   

2026/6/26 Calybium and cupule

Marvel of Peru (Mirabilis Jalapa) オシロイバナ(白粉花)

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The marvel of Peru (Mirabilis jalapa) is native to South America, came to Japan at the beginning of the Edo period (1603-1868), and is now planted for ornamental purposes across the country. It produces white, red, yellow, pink, and variegated flowers from late June to October. Its another name "four o'clock flowers" is after it usually opening at around 4 p.m.  

Its Japanese name is "Oshiroi bana," which translates into "white makeup powder flower," after the endosperm in the black seeds looking like white makeup powder.

2026/6/24

Pokeweed (Phytolacca Americana) 洋種山牛蒡(ヨウシュヤマゴボウ)

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The pokeweed (Phytolacca americana) is native to North America, came to Japan at the beginning of the Meiji period (1868-1912), and can now be found across the country. It produces tiny flowers with white petals and green ovaries from June to September, followed by fruits which are green at first but turn dark purple beautifully when ripe. (Scroll down!) The plant is toxic in its entirety despite its beautiful appearance. 

2026/6/24

Annabelle Hydrangea (Hydrangea Arborescens 'Annabelle') アナベル

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The Annabelle hydrangea (Hydrangea arborescens 'Annabelle') is a cultivar of Hydrangea arborescens. The hydrangea is a late bloomer, producing flowers from May to July, which are lime green at first, turning white and then green again. Below are the shots of various hydrangeas. Hope you enjoy them!

Lily of the Nile (Agapanthus) アガパンサス(紫君子蘭)

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The Lily of the Nile or the African lily is native to Southern Africa, was introduced to Japan during the Meiji era (1868-1912) and can now be found across the country, producing pale purple and white (sometimes pink, which I've never seen) flowers from May to August in Tokyo. The lily is popular for its flowers blooming during the muggy rainy season in Japan (usually from June to mid-July).   

2025/6/20

Himalayan Ash (Fraxinus Griffithii) シマトネリコ(島梣)

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The Himalayan ash (Fraxinus griffithii) is native to subtropical to tropical Asia and can be found in Japan (mainly in southern Japan), producing large panicles of small white flowers from May to June. 

The tree is known to attract Japanese rhinoceros beetles (Trypoxylus dichotomus) but is designated as an invasive species in some wards of Tokyo. 

2026/6/22

Trailing Abutilon (Abutilon Megapotamicum) ウキツリボク(浮釣木、チロリアンランプ)

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The trailing abutilon (Abutilon megapotamicum) is indigenous to Brazil, was imported to Japan during the Meiji period (1868-1912), and can now be found across the country. It produces lantern shaped flowers from May to October in Japan. The red part that looks like a lantern is sepals, the yellow part is petals, and the protruding brown thing is the style.  

2026/6/21

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