A mini-botanical garden close to Shibuya Station, the compact greenhouse here is crowded with more than 200 kinds of tropical plants as well as a few tanks full of fish and bugs. The facility runs weekly gardening classes (in Japanese) and holds regular annual events such as "Let's Play with Beetles" each August and a five-day evening firefly-watching party in June.

Upstairs is a small library with books on plants and insects, a few tables where you can sit and help yourself to free mugicha, and a miniature herb garden out on the third-floor terrace.