Upstream of Arakawa, Nagatori Valley of Chichibu, Saitama Prefecture. The surrounding natural beauty is outstanding. This course which goes through a clear blue flow and white whirlwater course is also recommended for family training with employee training, group travel, couples and elementary school students. Since the amount of water is relatively stable, you can enjoy rafting tours on long courses even in the dry season of summer. So whenever you join, you can enjoy Fun & Exciting tours.