Registered Tangible Cultural Properties of Japan

A three-arch concrete railway bridge of about 1938 in Oguni, Kumamoto, built from near-semicircular arches and flared piers, paired with Doyama Bridge across a hill.

An eleven-arch concrete viaduct of 1937 in Oguni, Kumamoto: 136 m long with a 23 m pier, the longest and tallest bridge left on the Miyanoharu Line. Off the trail.

A three-arch concrete railway bridge of about 1938 in Oguni, Kumamoto, almost identical to nearby Shioigawa Bridge except for its piers; the two frame a green hill.

A curved nine-arch concrete railway bridge of 1937 in Oguni, Kumamoto, with the line's smallest spans at 7 m, lying low across a valley of rice paddies; 80 m.

A curved four-arch concrete railway bridge of about 1938 in Oguni, Kumamoto. Its steel span over the highway was removed after closure, so the arches end abruptly.

A stone-lined well of about 1909 beside the stationmaster's house at Yatake Station, Hitoyoshi, built of cut welded tuff, 1.1 m across and 4.5 m deep. Not open.

A single-storey timber stationmaster's house of 1909 by Yatake Station on the Hisatsu Line, Hitoyoshi: gabled roof, board-and-batten walls, a rare Meiji rail home.

A 30-metre steel railway bridge of 1923 in Asagiri, built with one span and later given a second whose flanges were welded for heavier loads: two eras side by side.

A 1923 concrete arch in Hitoyoshi carrying a stream 43 metres through the railway embankment, its portal a five-centred arch to design No. 1007, and dry-stone walls.

The shortest registered bridge on the line, a 3.4-metre span of 1924 in Nishiki on an 8-foot I-beam to design No. 875, rolled by the Lanarkshire Steel Company.

A 4.8-metre steel bridge of 1923 near Hitoyoshi Onsen Station, rails set between two girders on longitudinal timbers, a detail of the earliest standard designs.

A two-span steel bridge of 1924 in Asagiri, 5.4 metres long, its 6-foot I-beams made by Japan's government steelworks, a foil to the British steel at Uchikado.

A 1953 steel shelter at the former Kawamura Station, its roof carried on curved angles rising from a bench. After the 2020 floods it became a memorial.

An unstaffed stop in Nishiki with a small steel shelter of 1953 and a platform of concrete and turfed bank, registered as an accent in the farmland still in service.

A four-span steel bridge of 1923 over the Kobashira River in Nishiki, 42 metres long, its 30-foot deck girders set on round piers of finely laid concrete block.

A 7.3-metre steel railway bridge of 1923 in Hitoyoshi: a 20-foot plate girder to standard design No. 540, with crimped stiffeners, on abutments of concrete block.

A two-span concrete bridge of 1923 in Nishiki, 4.3 metres long, apparently derived from a box-culvert design, with a cutwater on its pier and stone wing walls.

A six-span steel bridge of 1923 in Nishiki, 62 metres long, with 30-foot deck plate girders on oval concrete-block piers, 150 metres from its round-piered twin.

A 4.7-metre steel bridge of 1924 near Yunomae on a 12-foot I-beam made by the Carnegie company, almost perfectly symmetrical and 500 metres short of the terminus.

A cantilevered steel shelter of 1963 and a 110-metre steel platform built partly from old rails at Taragi-Shorenji, formerly Higashi-Taragi, a light design.