Tonkararin Tunnel Structure

The Tonkararin or Tonkararin tunnel structure is a 464.6 meter long, tunnel-like structure of unknown origin, situated in Nagomi, Kumamoto Prefecture, Japan. It lies on a plateau called Seibaru Daichi, around which are many kofun or tumuli, such as Eda-Funayama Kofun.

Japan, 〒865-0136 Kumamoto, Tamana District, Nagomi, Eta, 302 肥後民家村内

302 Eta, Nagomi, Tamana District, Kumamoto 865-0136, Japan

302 Eta, Nagomi, Tamana District, Kumamoto 865-0136, Japan

411-2 Segawa, Nagomi, Tamana District, Kumamoto 865-0135, Japan

411-3 Segawa, Nagomi, Tamana District, Kumamoto 865-0135, Japan

3611-2 Segawa, Nagomi, Tamana District, Kumamoto 865-0135, Japan

455 Eta, 玉名郡和水町 Tamana District, Kumamoto 865-0136, Japan

4354-3 Eta, Nagomi, Tamana District, Kumamoto 865-0136, Japan

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