I spent about 4 hours wandering around the small area of woodland about 100 meters from our house. The area has several clearings (sweet chestnut groves), a couple of ponds, and some mikan (orange) groves. Hardly anyone ever goes there and it’s a wildlife haven. The perfect place to spend a day looking for bugs.

chestnut grovedeadnettles and vetchCow parsleyorange grove
deadnettlesdeadnettles and vetch

Some of the most common plants:
sweet chestnut: kuri
dead nettle: odorikosou
vetch: karasunoendou
hedge parsley: yabujirami (seri-ka) – covered in bugs!

Great website for plant identification: http://www.botanic.jp/index.htm
Another plant website: http://www.mitomori.co.jp/hanazukan/hanazukan.html