Fabre Insect Museum ファーブル昆虫館 「虫の詩人の館」

My claim still holds true when I say that Tokyo has the most niche museums. Fabre Insect Museum (ファーブル昆虫館 「虫の詩人の館」) was built in 2006 and is home to tens of thousands of specimens... Entry is donation based and they're only open weekend afternoons only.