Dear people living in Japan and/or knowing more about plants than me...
One thing I love here is when old people giving you random things (usually food)... Except that usually they know what they're giving you.
This afternoon, one of the old ladies living in my neighborhood gave me these except that when I asked her what it was, she had no idea, she didn't even know if it was edible, she just had a bunch and felt like giving me some.
Do any of you know what those could be?