Itabashi Botanical Garden

The is an indoor botanical garden located at 8-29-2 Takashimadaira, Itabashi, Tokyo, Japan. 
It is open daily except Mondays. It was closed to start renovation work in September 2020 and reopened on April 20, 2021.
Overview.
The garden is a greenhouse containing more than 300 species of Southeast Asian plants, with an aquarium of tropical fish, mangrove forest with "Nypa fruticans", and other plants including Dipterocarpaceae, orchids, and rhododendrons. 
The aquarium is home to deep-sea fish, coral reef fish, Asian Tropical Rain Forest creatures, and long-term giant freshwater stingray.
See also.
List of botanical gardens in Japan