Araien Main Branch

This artificial lake straddles the boundary between Tokorozawa City and Iruma City, located in the south-central part of Saitama Prefecture. It was completed in 1934 as a water tank for Tokyo, and the official name is "Yamaguchi Reservoir". The lake is surrounded by Saitama Prefectural Nature Park, where you can enjoy 20,000 cherry blossom trees in spring, vividly colored leaves in autumn, the symbolic Mt. Fuji reflected on the lake's surface, and bird watching. The stunning seasonal scenery of this area has been selected as one of Saitama's 100 Selected Nature Spots and 100 Selected Dam Lakes.

This is a museum with the main theme being tea. Ample resources for learning are available on a range of topics starting from the Sayama tea, tea’s history and culture, Iruma City’s nature and history. Within the large garden, there is a tearoom, copse, restaurant, and a square with lawns. It is an ideal place to get some rest.

Newly reopened in 2021 with the concept: "A heart-warming world nestled in happiness." Find yourself in a world of wonder with high-quality replicas of retro townscapes, interactions with townspeople and spontaneous live performances, and delicious nostalgic foods. There are also new and exciting immersive light-up attractions for you to enjoy!

This establishment utilizes the nature of Saruyama Hill to provide an opportunity to interact with, and think of our relation to nature. You can find an exhibition room, observation balcony, seminar hall, outdoor grilling space, and much more here. At the hill, you can also find five themed spots. The waterbirds paradise, the bugs' forest, the hydrophyte village, the grove of trees, and the butterflies' forest.

At this memorial museum, materials related to the history of aviation are displayed alongside actual airplanes. Visitors can learn about the principles of flight and aviation history from a variety of angles through flight simulators and helicopter piloting simulators! The many airplanes and helicopters displayed throughout the museum are a must-see. A special place to experience the wide-open skies and the history of flight in Tokorozawa. Aircraft craft workshops for families are also held regularly.