
Chichibu-Tama-Kai is the least visited of the national parks within easy striking distance of Tokyo. With eight peaks over 2000m scattered over 1250 km2, there are plenty of hiking opportunities and ancient shrines to visit.
It is possible to hike Mitsumine and Mitake either separately as day trips, or as a full day's hike along the trail connecting the two.
The most popular access route is on the Seibu Chichibu Line (西武秩父線) from Ikebukuro in Tokyo to the terminus Chichibu station (75 minutes, ¥1370 via limited express).
For access to the Oku-Tama region, take the JR Chuo line to terminus Ome (75 minutes), transferring at Tachikawa if necessary. From here, transfer to the Ome line; a trip to (eg.) Mitake station from here takes 20 minutes and costs ¥890.