Three Waterfalls of Unazawa Hike

Unazawa Otaki Falls 海沢大滝 – Onara Pass 大楢峠

Duration: 5 hours
Distance: 14.5 km
Elevation change: 340 metres
Highest point: 680 metres
Start: Shiromaru Station (Ome Line)
Finish: Kori Station (Ome Line)
Map: Yama to Kogen Chizu 山と高原地図 [No.24 奥多摩 OKUTAMA]

An Early Spring Hike

This hike pays a second visit the picturesque Unazawa Valley in Okutama. A few years back I made it as far as the Mitsugama Falls before succumbing to a migraine which put a stop to seeing the other two falls which make up the Unazawa-no-santaki or Unazawa three waterfalls. It’s recommended to go in fine weather as the path near the Otaki waterfall requires crossing some rocks which are most likely slippery in the wet.

The hike starts out from Shiromaru Station 白丸駅 one stop before Okutama on the JR Chuo Line. After exiting the station go down the stairs, cross the Kazumakyo Bridge and follow the trail which snugs the banks of the Tama River. After 15 minutes the path reverts to bitumen where there are some restrooms below the nearby power plant. Head up to the road where you will pass some fish ponds on your left and look for a sign pointing to the America Camp Village. The distance from here to the rest area at Unazawa enchi 海沢園地 is around 3.5 km.

Along the way you need to pass through the Unazawa Tunnel 海沢トンネル a supposedly haunted spot. The tunnel is 70 metres in length, built in the early 1960s and has a creepy ass atmosphere. A little further along I came across a kamoshika or Japanese serow in a clearing just off the road which took me by surprise. The trailhead makes an ideal rest stop a little up from the Tenguiwa Falls. To properly explore falls and return the Unazawa enchi rest area allow a good hour.

A 5-minute walk from the carpark finds the three-tiered Mitsugama Falls 三つ釜の滝 (12-metres) which I photographed on the previous outing. These falls are arguably the finest of the trio formed like a natural water slide. Ascending a steep flight of stairs finds the twisted and dimly lit two-tiered Nejire Falls ネジレの滝 (10-metres). To reach Otaki Falls 大滝 (23-metres) follow the trail which cuts around up stream and down some earthen steps. Interestingly one sign indicates a fourth waterfall 海沢四滝 namely the Fudo Waterfall 不動滝 located just above the Otaki Falls however there didn’t appear any obvious access.

After getting your fill of waterfalls return to the rest area and continue along the road to the Onara Pass 大楢峠. The trail to Hatonosu and Kori Stations passes the Kaizawa Buttress a popular rock-climbing spot before hitting a paved road. At the second picnic shelter turn right and follow the signs back to Kori Station 古里駅.