No.4 Yamatogawa railway bridge, Railway bridge in Kashiwara, Japan.

The No.4 Yamatogawa railway bridge carries the Kansai Main Line (Yamatoji Line) over the Yamato River in Kashiwara, Osaka. It is about 233 m long and curves at a radius of 400 m, crossing the river at a 30-degree skew. Its deck consists of separate 12-span steel plate girders for each track, supported by reinforced concrete piers and abutments, with a rare 144-tonne Warren truss that carries short girder spans.

This railway bridge was constructed as a key transportation link in Osaka prefecture, supporting the region's connection through the Yamatoji Line. Its design and construction earned it recognition as part of Japan's important civil engineering heritage.

The bridge serves as a daily connection for commuters traveling between nearby towns on the Yamatoji Line. It has become part of the local landscape where people rely on trains to move through the Osaka region.

The bridge lies between Mishima and Kawachi-Katakami stations on the Kansai Main Line, just east of Kawachi-Katakami and near the Nara prefecture border. From the south bank, National Route 25 runs beneath the second and third plate girders, and the old Tatsuta-goe Nara road passes under the twelfth. The curve and the girder-support truss are best seen from the river's south side.

The bridge's most distinctive element is a 144.071-tonne Warren truss, 30 m long, that acts as a girder carrier: it supports one side of the 4th and 6th plate girders, with a short 5th girder resting on top. The truss looks like a through-truss bridge but carries girders rather than a roadway.