# Japan National Route 410

National Route 410 (国道410号, Kokudō Yonhyakujūgō) is a national highway located entirely within Chiba Prefecture, Japan. It connects the cities of Tateyama and Kisarazu, spanning the Bōsō Peninsula in a south–north routing. The highway has a total length of 110.4 kilometers (68.6 mi).

## Route description

National Route 410 connects the cities of Tateyama and Kisarazu, spanning Chiba Prefecture's Bōsō Peninsula in a south–north routing. Its southern terminus lies at a junction with National Route 127 and National Route 128 in central Tateyama. It travels south from there towards the southern tip of the Bōsō Peninsula, Cape Nojima. Upon reaching the cape, the highway begins curving to the north heading through Minamibōsō and the former town of Chikura. It has another junction with National Route 128 in the former town of Maruyama, sharing a brief concurrency with the route before continuing north into the city of Kamogawa. The highway has a total length of 110.4 kilometers (68.6 mi).

## History

In 1902, the Yomachisaku Daiichi Tunnel (四町作第一隧道, Yomachisaku Daiichi Zuidō) was completed using only hand tools along what would become National Route 410 in the city of Kimitsu. The tunnel is the second oldest tunnel that is designated as a part of a national highway in Japan.
National Route 410 was established by the Cabinet of Japan in 1982. Construction began on the Kururi–Makuta Bypass of the narrow sections of the highway including the Yomachisaku Daiichi Tunnel in 1989. The 10.7-kilometer-long (6.6 mi) bypass was scheduled to be completed by 2015, but as of 2021, the bypass has yet to be completed. On 23 December 2015, a 20-meter-long (66 ft) section of the Yomachisaku Daiichi Tunnel's shotcrete lining collapsed following a re-application of the supportive lining a month prior to the collapse. The tunnel lining was repaired by the following day.

## Major intersections

The route lies entirely within Chiba Prefecture.
| Location | km | mi | Destinations | Notes |
| Tateyama | 0.0 | 0.0 | National Route 127 north (Tateyama Bypass) – Chiba, Kisarazu National Route 128 (Sotobō–Kuroshio Line) – Tateyama Station, central Tateyama, Kamogawa, Minamibōsō | Southern terminus; highway continues north as National Route 127 |
| Tateyama | 1.3 | 0.81 | Chiba Prefecture Route 188 east – Chikura | |
| Tateyama | 1.5 | 0.93 | Chiba Prefecture Route 86 – Shirahama, central Tateyama | |
| Tateyama | 2.3 | 1.4 | National Route 410 north (Hōjō Bypass) – Central Tateyama, Shiroyama Park, Oki no Shima | |
| Tateyama | 9.8 | 6.1 | Chiba Prefecture Route 257 north (Bōsō Flower Line) – Sunozaki | |
| Tateyama | 10.0 | 6.2 | Chiba Prefecture Route 252 south – Tomisaki Fishing Port | |
| Minamibōsō | 15.9 | 9.9 | Chiba Prefecture Route 86 north – Tateyama, Shirahama | |
| Minamibōsō | 29.1 | 18.1 | Chiba Prefecture Route 187 west – to Futtsu Tateyama Road, Tateyama, Chikura Station | |
| Minamibōsō | 29.2 | 18.1 | Chiba Prefecture Route 251 south – Chikura-Seaside | |
| Minamibōsō | 30.3 | 18.8 | Chiba Prefecture Route 241 west – Chikura Station | |
| Minamibōsō | 32.8 | 20.4 | Chiba Prefecture Route 297 north – Kamogawa, Rosemary Park | |
| Minamibōsō | 35.5 | 22.1 | National Route 128 north (Sotobō–Kuroshio Line) – Kamogawa | Southern end of National Route 128 concurrency |
| Minamibōsō | 36.1 | 22.4 | National Route 128 south (Sotobō–Kuroshio Line) – to Futtsu Tateyama Road, Tateyama | Northern end of National Route 128 concurrency |
| Minamibōsō | 38.3 | 23.8 | Chiba Prefecture Route 296 – to Futtsu Tateyama Road, Funakata, Wada | |
| Minamibōsō | 41.1 | 25.5 | Chiba Prefecture Route 258 west – Masuma | |
| Minamibōsō | 46.1 | 28.6 | Chiba Prefecture Route 89 west – Iwai | Southern end of Chiba Prefecture Route 89 concurrency |
| Minamibōsō | 47.8 | 29.7 | Chiba Prefecture Route 89 east – Kamogawa | Northern end of Chiba Prefecture Route 89 concurrency |
| Kamogawa | 53.2 | 33.1 | Chiba Prefecture Route 34 (Nagasa Kaidō) – Hota, central Kamogawa | |
| Kimitsu | 65.4 | 40.6 | National Route 465 west – Central Kimitsu, Kisarazu, Futtsu | Southern end of National Route 465 concurrency |
| Kimitsu | 74.0 | 46.0 | National Route 465 east / Chiba Prefecture Route 24 south (Kururi Kaidō) | Northern end of National Route 465 concurrency, southern end of Chiba Prefecture Route 24 concurrency |
| Kimitsu | 81.8 | 50.8 | Chiba Prefecture Route 32 east – Ōtaki Chiba Prefecture Route 93 west – Futtsu | |
| Kimitsu | 82.2 | 51.1 | Chiba Prefecture Route 145 north – Kisarazu | |
| Kimitsu | 84.1 | 52.3 | National Route 410 (Kururi–Makuta Bypass) | Large trucks are prohibited from going south on the Kururi–Makuta Bypass |
| Kimitsu | 84.5 | 52.5 | Chiba Prefecture Route 163 west – Kisarazu | |
| Kimitsu | 86.3 | 53.6 | Chiba Prefecture Route 23 west – Kisarazu, Kazusa Akademia Park, Obitsu Station | |
| Kimitsu | 86.5 | 53.7 | Chiba Prefecture Route 160 east – Itabu, Kururi Castle | Southern end of Chiba Prefecture Route 160 concurrency |
| Kimitsu | 87.1 | 54.1 | National Route 410 south (Kururi–Makuta Bypass) – Kisarazu, Kamogawa, Kururi Chiba Prefecture Route 160 ends | Northern end of Chiba Prefecture Route 160 concurrency |
| Kisarazu | 90.0 | 55.9 | Chiba Prefecture Route 166 – Shimogōri, Makuta | |
| Kisarazu | 90.6 | 56.3 | Ken-Ō Expressway – to Tokyo Bay Aqua-Line, Tateyama Expressway, Chōshi, Mobara | Kisarazu-higashi Interchange (C4 exit 105) |
| Kisarazu | 92.3 | 57.4 | Chiba Prefecture Route 167 – to Tateyama Expressway, Kisarazu, Makuta | One-quadrant interchange |
| Sodegaura | 93.7 | 58.2 | National Route 409 east (Bōsō Ōdan-dōro) – Mobara, Ushiku Chiba Prefecture Route 24 north – to Tateyama Expressway, Chiba, Ichihara | Northern end of Chiba Prefecture Route 24 concurrency, southern end of National Route 409 concurrency |
| Sodegaura | 95.8 | 59.5 | Chiba Prefecture Route 165 east – Ichihara, Katsuura Chiba Prefecture Route 167 south – Kururi | Southern end of Chiba Prefecture Route 165 concurrency |
| Sodegaura | 96.9 | 60.2 | Chiba Prefecture Route 145 south – Kimitsu, Kazusa Akademia Park | Southern end of Chiba Prefecture Route 145 concurrency |
| Sodegaura | 97.2 | 60.4 | Chiba Prefecture Route 145 north – Nagaura | Northern end of Chiba Prefecture Route 145 concurrency |
| Sodegaura | 97.4 | 60.5 | Chiba Prefecture Route 165 west – Yokota Station | Northern end of Chiba Prefecture Route 165 concurrency |
| Sodegaura | 99.2 | 61.6 | Chiba Prefecture Route 33 south – Kimitsu, Kazusa Akademia Park | |
| Kisarazu | 99.6 | 61.9 | Tateyama Expressway – to Tokyo Bay Aqua-Line, Ken-Ō Expressway, Tateyama, Chiba | Kisarazu-kita Interchange (E14 exit 15) |
| Kisarazu | 99.2 | 61.6 | Chiba Prefecture Route 33 south – Kimitsu, Kazusa Akademia Park | |
| Kisarazu | 102.7 | 63.8 | National Route 410 north (Bōsō Ōdan-dōro) – Central Kisarazu | Partial interchange; northbound entrance, southbound exit |
| Kisarazu | 103.2 | 64.1 | Chiba Prefecture Route 146 – Central Kisarazu, Sodegaura | |
| Sodegaura | 105.0 | 65.2 | Tokyo Bay Aqua-Line – to Tateyama Expressway, Keiyō Road, Chiba | Sodegaura Interchange (CA exit 3); northbound entrance, southbound exit |
| Sodegaura | 105.2 | 65.4 | National Route 16 – Tateyama, Kisarazu, Chiba, Ichihara National Route 409 west – to Tokyo Bay Aqua-Line, Kawasaki, Tokyo | National Route 410 reverses here |
| Sodegaura | 105.4 | 65.5 | Tokyo Bay Aqua-Line – to Tateyama Expressway, Keiyō Road, Chiba | Sodegaura Interchange (CA exit 3); northbound entrance, southbound exit |
| Kisarazu | 107.2 | 66.6 | Chiba Prefecture Route 146 – Central Kisarazu, Sodegaura | |
| Kisarazu | 108.0 | 67.1 | National Route 409 east / National Route 410 south (Bōsō Ōdan-dōro) – Central Kisarazu | Partial interchange; northbound entrance, southbound exit, northern end of National Route 409 concurrency |
| Kisarazu | 108.6 | 67.5 | Chiba Prefecture Route 146 north – Sodegaura | |
| Kisarazu | 110.4 | 68.6 | National Route 16 (Wangan-dōro) – to Tokyo Bay Aqua-Line, Tateyama, Chiba Chiba Prefecture Route 90 west (Bōsō Ōdan-dōro) – Kisarazu Port, central Kisarazu | Northern terminus; interchange; highway continues west as Chiba Prefecture Route 90 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access Route transition |||||