Unsurprising for an island nation, most of Japan’s cuisine is laced with fish…including those incredibly appetizing bento (boxed meals) you can see in convenience stores and department store delis.
For strict vegetarians and vegans, this can be a bit trying. But no fear! The health food chain Natural House has a selection of delicious macrobiotic bento, which are vegan!
They also have lots of other goodies, including quite a few Japanese treats that are vegetarian and vegan friendly.
There are several stores across Tokyo, so keep an eye out for them.
Sadly, the main website is only in Japanese, but you can always right click and go to “Translate to English” (at least for Apple computers): https://www.naturalhouse.co.jp/