History
Hamachō Station opened on 21 December 1978 with the inaugural Iwamotochō–Higashi-Ōjima section of the Toei Shinjuku Line. The station sits beneath Hamachō Park in Nihonbashi-Hamachō, with the concourse on basement level 1 and the platform on basement level 3 along a 510-metre-radius curve. Two single-track shield-bored tunnels were joined into a single island-platform chamber using the pipe-roof method, in which 1.2-metre steel pipes were hydraulically pushed into the ground above the running tunnels to support the soft soil while it was excavated — a technique now associated with so-called "goggle-style" shield stations. During construction in 1976 workers unearthed Naumann elephant fossils near the worksite, catalogued as the Hamachō Specimen. PASMO IC cards were accepted from 18 March 2007.
History summarized from Japanese & English Wikipedia · last reviewed 2026-05-18.
Notes
During construction in 1976, workers excavating beneath Hamachō Park unearthed Naumann elephant fossils that were catalogued as the "Hamachō Specimen."