“Sansai/Wild Mountain Plants” are around the corner so I thought it might be a good idea to draw people’s attention back to them for easier reference! They also include wild fruit that can be eaten both as vegetables and fruit with various preparations.
Some can be boiled, others fried, prepared as tempura, cooked in soup, prepared as pickles or jam, etc.

As it would become far too big (already massive, but inexhaustive) a posting if I wrote everything, please pick up one item at a time if you want more explanations and I will write an individual article for your pleasure!
But some have added some since the last time I wrote about them and I added some facts!

Here we go:
(No particular order)

AINU NEGI: ALIUM VICTORIALIS
Also called: GYOUJA NINIKU/VICTORY ONION/ALPINE LEEK

High in Vitamin B1

AKEBI: CHOCOLATE VINE

High in Potassium, Vitamin B1, B2, B6, C and vegetal fibers.
Provide great stamina!

AMADOKORO: POLYGONATUM ODORATUM

AZAMI: THISTLE

FUKINOTO: GIANT BUTTERBUR/FLOWER CLUSTER

High in Vitamin A Beta carotene, B1, B2, b6, C, vegetal Fibers and Potassium.

HAMABOUFUU: GLEHNIA LITTORALIS

HANGONSOU: SENECIO CANNABIFOLIUS

HASUKAPPU: LONICERA CAERULEA/HASCUP

HIKAGEHEGO: FLYING SPIDER MONKEY TREE FERN

IRAKUSA: URTICA THUNBERGIANA

ITADORI: JAPANESE KNOTWEED

KATAKURI: DOGTOOTH VIOLET

Flowers are also edible.

KIBOUSHI: PLANTAIN LILY HOSTA FORTINEI ( a variety of Hosta Montana)

KOGOMI: OSTRICH FERN (exists as green and red)

Great plant as it needs no special procees to erase tanginess.
High Carotenes, Vitamin C, Amino acids and vegetal fibers.

KOSHIABURA : ASCATHOPANAX SCIADOPHYLLOIDES

KUKO: CHINESE WOLFBERRY

KUSAGI: HARLEQUIN GLORY BOWER PEANUT BUTTER SHRUB

MATATABI: SILVER VINE

MITSUBA: JAPANESE HONEYWORT

NIRINSOU: ANEMONE FLACCIDA

NOBIRU: ALIUM MACROSTEMON

High in Vitamin C, Carotenes, Calcium, Potassium and vegetal fibers.

OYAMABOKUCHI: SYNURUS PUNGENS

RYOUBU: CLERTHRA BARBINERVIS

SARUNASHI: ACTINIA ARGUTA

SERI: JAPANESE PARSLEY

SUBERIYU: COMMON PURSLANE

TAKENOKO: BAMBOO SHOOTS (SPROUTS)

TANPOPO: DANDELION

TARA NO ME: ARALIA ELATA

High in Potassium, Vitamin A Beta Carotenes, B2 and vegetal fibers.

TSUKUSHI: HORSETAIL

High in Potassium, Magnesium, Carotenes and Vitamin E.

TSUROGANENINJIN: ADENOPHORA TRIPHYLLA

UDO: ARALIA CORDATA

High in Potassium, Calcium, Magnesium, Vitamin B1, C, Pantotene acid.
Helps combat human body acidity.

YAMAUDO: same as UDO (above)

URUI: HOSTA MONTANA

Can be eaten raw.
Great in salads. Have become a common vegetable in Japan.

WARABI: PTERIDIUM AQUILINUM/BRACKEN

High Potassium, Calcium, Magnesium, Iron, Vitamin B2, C, E and vegetal fibers.

YAMABUDO: CRIMSON GLORY VINE

YAMAWASABI: WILD HORSERADISH

ZENMAI: OSMUNDA JAPONICA/ROYAL FERN

High in Potassium, Vitamin A Beta Carotenes, B2, B6, C and vegetal fibers.

FUKI:JAPANESE BUTTERBUR/GIANT BUTTERBUR

High in Potassium, Calcium, Vitamin B2 and vegetal fibers.

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Still have to find the English names for the following ones!

AIKO

AKAMIZU/ELATOSTEMA UMBELLATUM var. NAJUS

Found the name!

AOMIZU

INUDOUNA

SHIDOKE

ITADORI

HONNA/Also called SUPPON

YOMOGI/MUGWORT

Not to be confused with absinthe!

NOKANZOU

YUKINOSHITA/BEEFSTEAK GERANIUM

Found the name!

RECOMMENDED RELATED WEBSITES

Pierre.Cuisine, Francescannotwrite, My White Kitchen, 47 Japanese Farms Through The Eyes of Its Rural Communities, Foodhoe, Chucks Eats, Things that Fizz & Stuff, Five Euro Food by Charles,Red Shallot Kitchen by Priscilla,With a Glass, Nami | Just One Cookbook, Peach Farm Studio, Clumsyfingers by Xethia, PepperBento,Adventures in Bento Making, American Bent, Beanbento, Bento No, Bento Wo Tsukurimashou, Cooking Cute, Eula, Hapabento , Happy Bento, Jacki’s Bento Blog, Kitchen Cow, Leggo My Obento, Le Petit Journal Bento & CO (French), Lunch In A Box,
Susan at Arkonlite, Vegan Lunch Box; Tokyo Tom Baker, Daily Food Porn/Osaka, Only Nature Food Porn, Happy Little Bento, The Herbed Kitchen, J-Mama’s Kitchen, Cook, Eat, Play, Repeat, Bento Lunch Blog (German), Adventures In Bento, Anna The Red’s Bento Factory, Cooking Cute, Timeless Gourmet, Bento Bug, Ideal Meal, Bentosaurus, Mr. Foodie (London/UK), Ohayo Bento,

Must-see tasting websites:

-Sake: Tokyo Through The Drinking Glass, Tokyo Foodcast, Urban Sake, Sake World
-Wine: Palate To Pen, Warren Bobrow, Cellar Tours, Ancient Fire Wines Blog
-Beer: Good Beer & Country Boys, Another Pint, Please!
-Japanese Pottery to enjoy your favourite drinks: Yellin Yakimono Gallery