Four metres fifty-three, and at the top there is a real triangulation point.
It is 4.53 metres high and the climb takes about ten seconds, but on the summit there is a second-order triangulation benchmark, so on the maps of the geographical institute it is a mountain in every respect. The shops on the south side of the park issue a climbing certificate.
It is not a natural hill: it is the mound of earth dug out of the Aji River when it was dredged in 1831, piled up at the mouth to serve as a landmark for sailors. ⚠️ It lost the title of Japan's lowest mountain in 2014: after the 2011 earthquake Sendai's Hiyoriyama sank to 3 metres and the geographical institute recognised it as such. Tenpōzan remains the lowest of those built by people and of those with a second-order benchmark.
ℹ️ It is in Tenpōzan Park, outdoors and free, next to the aquarium and the port's Ferris wheel. Ōsakakō Station on the Chūō Line.
🚉 Ōsakakō · 7 min walk
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