Extra information:
The peak actually goes by two names, and the locals don’t seem to know which one is correct. Most people call it Misumi-dake (三角岳) but others use the name Sankaku-dake (三角岳).
The mountain is a good day hike from Kumamoto city and offers spectacular panoramic views.
There aren’t any convenience stores in Misumi, so make sure you pick up supplies/snacks in Kumamoto before boarding your train.
Hiking in Japan 