Fake replica of a Japanese castle built in 1959 on the hills overlooking the seaside resort of Atami. Although not a historical site, the interior houses a museum with samurai-themed exhibits, try-on armor, a retro game room, and an observation deck offering panoramic views of Atami Bay. The spot is mainly visited for its view and quirky attractions rather than any historical value.

Price: Around 1,100 ¥
Touristy? : Moderately touristy. Popular among Japanese families and visitors looking for scenic views or offbeat activities.