Mitsuya Kofun, octagonal tomb, Yoshioka Town
Article

10345 / よしおかまち

Gunma Prefecture 北群馬郡

Yoshioka Town

Bamboo felled; an octagonal tomb found.

Mitsuya Kofun, octagonal tomb

Photo by Saigen Jiro (CC0)

01 / Person

Alongside his medical work, he spent 30 yearsdistilling silkworm rearing into one book.

Person in Yoshioka Town
Photo by こやまひろ (CC BY 4.0)

Baba Shigehisa was born in what is now Yoshioka in the 3rd year of Kanbun (1663) and devoted himself to improving sericulture alongside his medical work. He gathered 30 years of practice and theory into Kaiko Yoiku Tekagami. His grave in Kitashimo is a Gunma Prefecture historic site.

  • Born 1663
  • 30 years of practice
  • Prefectural historic site (1952)

02 / Kofun

1.5 km west of Mitsuya Kofun,a tomb with a chamber of cut stone.

Kofun in Yoshioka Town
Photo by Saigen Jiro (CC0)

The Town's 1996 report describes the Minamishimo Kofun Group as once more than 40 tombs, all with corridor-style stone chambers; chambers A and E are of cut stone fitted together. Tomb A is estimated to date from the third quarter of the 7th century. Minamishimo Kofun Park opened in 2010, with the Cultural Properties Center beside it.

  • Prefectural historic site (8 Sep 2023)
  • Tomb A: est. third quarter of 7th c.
  • Park completed 2010

03 / Highway

"Right to Echigo, left to Ikaho."A stone at the fork names each way.

Highway in Yoshioka Town
Photo by こやまひろ (CC BY 4.0)

Okubo was a post town on the Sado Kaido, and the town's newsletter says northern daimyo, Sado magistrates and merchants passed through. The signpost stands at the fork between the Sado Kaido and the Ikaho road, carved "Right Echigo, left Ikaho".

  • Fork of Sado Kaido and Ikaho road
  • "Right Echigo, left Ikaho"

Yoshioka Town from the sky

Now and 1974–78. Tap a photo to zoom in.

Wide (about 6 km across)

Close (about 1.5 km across)

Now (shot August 2020)Shot 1974–78

Source: Geospatial Information Authority of Japan (GSI) GSI Tiles(全国最新写真(シームレス)/国土画像情報(第一期:1974〜1978年撮影))

Open in GSI Maps (now)Open in GSI Maps (1974–78)

Living here

No train station. Bus from Shibukawa Station in 15 minutes.

  • about 20,000 people
  • Rural district town

The town has no railway station. Kan-etsu Kotsu buses run from JR Shibukawa Station in about 15 minutes, and Nihon Chuo Bus serves Maebashi Station. Komayose Smart IC on the Kan-etsu Expressway began full operation in 2006. The town covers 20.46 km² on the south-eastern foot of Mt. Haruna.

People living here
21,792people
19952020

+3.4% since 2015

15,171 → 21,792

Area
20.46km²

16.8km² of it habitable

2024

Households
7,863households

2.8 people per household

2020

Rent (average for rentals)
57,693yen

National average 60,630 yen

2023

Healthcare
1 hospital / 16 clinics

7.8 per 10,000 people

2023

Area20.46km²Habitable land16.8km² / 82%
Area and habitable land at the same scalee-Stat B1101 / B1103
Children waiting for childcare
—5 nurseries and similar
Home purchase subsidy
—
Average annual temperature
—

These 3 items are waiting on a nationwide data source. We do not fill them with estimates.

ACCESS

Where you can go from here.

Yoshioka Town in Japan36.447°N 139.010°E
OsakaYoshioka Town
Yoshioka Town Office
吉岡町役場2010
  • to ShibukawaLocal bus15min
  • to MaebashiLocal bus27min

Travel times follow ①関越交通『高崎渋川線時刻表』渋川駅〜群馬温泉〜イオンモール高崎〜北高崎駅前〜高崎駅(平日=2026年3月1日改正・土日祝=2025年10月1日改正)の渋川駅④番発→『下野田』着。②日本中央バス『19 前橋吉岡線』(2024年3月24日改正)の前橋駅北口⑤番発→『吉岡町役場入口』着 (checked 2026-10-21). They vary by time of day.

Shape

Borders 3 municipalities.

Territory of Yoshioka Town
Boundaries: National Land Numerical Information (Administrative Area Data), MLIT. Processed by Machigatari.Lakes: National Land Numerical Information (Lake Data), MLIT. Processed by Machigatari. Prepared with the approval of the Director-General of the Geospatial Information Authority of Japan, using its Digital Map 25000 (Spatial Data Framework) and Digital Map 25000 (Place Names and Public Facilities). (承認番号 平27情使、第585号)

Yoshioka Town isthis kind of town.

  1. 01The prefecturally designated Mitsuya Kofun is a two-tier regular octagon, about 23.8 m corner to corner at the base, estimated to date from the late 7th century
  2. 02Baba Shigehisa, born in town in 1663, wrote the sericulture book Kaiko Yoiku Tekagami
  3. 03A signpost reading "Right Echigo, left Ikaho" stands at the fork of the Sado Kaido and the Ikaho road

If something caught your eye, ask the town itself.