Visited on 2026/3/24. It's a rest area, so there are tables and chairs for several groups. The view is good too. It said “promenade,” so I went in from Miyanohama without a second thought, but I can't recommend the Tsurihama〜Nagasaki Observatory section to people who aren't confident in their stamina. Anijima is beautifully visible, so I think it's useful as a photo spot. Tourists aren't allowed to set foot there, so at least I want to take nice photos of it... I recommend it for people like that.

+3

This year, for the 2nd year in a row, I did an uphill run from the Omura area to Nagasaki Observatory. At that point I saw a guide board and, without thinking, trail-ran the Denshinyama Promenade to visit, but rather than running, just walking was all I could manage and it was exhausting. But the weather was good too, so I could take in the coastal scenery from Denshinyama and feel how big Anijima is, so I think the walk was worth the effort. I think it'd be nice to walk it with someone. There are markers on the ground along the way to keep you from getting lost, so basically you won't get lost, but it's so quiet that alone it might feel a bit lonely (・∀・)

+3

Walk to the end of the beach and climb the steps along the rocks, and there's a spectacular view. There's also an air-raid shelter (lookout post). It's a mountain whose name has a military ring to it. Denshinyama was the name of a national forest reference point (*), not a mountain name. When the Tokyo Metropolitan Government was developing the walking trails of Ogasawara National Park, it mistook the reference point name noted on the national forest management implementation plan map for a mountain name, and named it the Denshinyama Trail. Later, newly built teachers' housing was also named “Denshinyama Staff Housing” (*2). Denshinyama was likely adopted as the national forest reference point name because the former Navy's Chichijima North special lookout, established in 1914 at the Tsurihama trailhead and on this ridge, was renamed the Chichijima Naval Wireless Telegraph Station in 1920 (*3)

+2

Partway along the Denshinyama Line Trail that runs from Miyanohama to Nagasaki Observatory, there's a somewhat open spot with tables for resting, a guide board, and a triangulation point. From here you can see Futami Bay and the town center to the south, Anijima Seto to the north, and Mt. Mikazuki to the east. Even without walking from Miyanohama, you can get here in about 10 minutes on foot from the road heading from Kiyose to Tsurihama, or from Okumura, so I think you can easily enjoy a nice view. However, there's nothing to block the sun, so in summer and such, resting here for a long time might be tough.

The Denshinyama Line Promenade from Miyanohama to Nagasaki Observatory. I highly recommend walking it. Keep going along Yoake Road via Asahiyama~Yoakeyama~(Hatsuneura is tough, so save it for another time) Chuozan~and complete the Ogiura Promenade. You'll realize Ogasawara's appeal isn't just the sea. The beer you drink at Ogiura・Beachcoma is outstandingly delicious. Denshinyama, by the way, is the common name for the site of the Chichijima Naval Communications Unit transmitting station.