[1] The mountain had an elevation of about 20 meters at the time, and served as a marker for ships entering the Ajigawa river to head to the city of Osaka.

Part of the mountain was leveled to set up an artillery unit to protect the river pass after the fall of the Tokugawa shogunate.

This caused the mountain's name to be erased from topographic maps until it was reinstated due to fierce protests from local residents.

The club held annual "climbing events" on new year's day and April 5th (in reference to Mount Tenpō's 4.5 meter elevation) which by 2000 drew the attendance of around a thousand people as well as newspaper and television coverage.

In the spirit of いちびり (ichibiri, an Osaka dialect term meaning "taking a joke to the extreme") they issued commemorative "mountain climbing certificates" at these events and also to anyone who would apply and pay the issuance fee of 10 Yen.