Alley Karasukojima, Civil engineering heritage park in Kure, Japan

Alley Karasukojima is a narrow park laid out along a stone-block quay in Kure, Hiroshima Prefecture. Its name means "alley" and refers to the long, thin strip beside the water. The park has brick-colored interlocking paving and a deck that juts out toward the submarines of the Japan Maritime Self-Defense Force. Old naval items, including a torpedo-loading crane and mooring bollards, stand as monuments.

The land served as a torpedo launching training ground in the Taisho era and became a public park in 1985. This shift shows how a military site was converted to community use.

The name Karasukojima comes from a small island about 40 metres around that once stood in Kure Bay and was filled in during the Taisho era for torpedo-launching practice. Across the road, the Showa-cho brick warehouses of the former Kure Naval Arsenal electrical department date from 1897, built with British brick and Kurahashi Island granite, the same stone used for the National Diet Building.

Take a Hiroden bus or the Kure Tanbo loop bus (Kuretan) to the Sensuitai-mae stop; the park entrance is about a one-minute walk. By car, it is roughly ten minutes from the Kure Interchange on the Hiroshima-Kure Road. Parking is in nearby Kushiyama Park, with 41 spaces for cars and 10 for buses.

The park provides direct views of submarines and escort vessels from the Japan Maritime Self-Defense Force anchored at the nearby Kure Naval Base. This rare feature connects civilian space with active military presence in an unusual way.