★ World Heritage Sakai-ku, Sakai, Osaka Round mound

Tsukamawari Kofun

LocationSakai-ku, Sakai, Osaka
ShapeRound mound
Mound diameter (Agency for Cultural Affairs)35 m
PeriodEarly–mid 5th c.
DesignationNational Historic Site
World HeritageMozu-Furuichi Kofun Group (UNESCO)

Overview

A round mound 35m across and 4.5m high (4.5m per the World Heritage site and the Agency for Cultural Affairs; Sakai City gives 5.1m), standing about 15m beyond the outer moat on the east side of Daisen Kofun—a position that suggests a connection with the great mound, though the Imperial Household Agency has not designated it a satellite tomb. The World Heritage site dates it to the first half of the 5th century and Sakai City to the middle of that century; it is protected and managed by Sakai City as part of the National Historic Site Mozu Kofun Group. Excavation in 1912 found a wooden coffin laid directly in the mound, with two bronze mirrors, an iron sword, an iron blade and a large quantity of beads. It is a constituent monument of the Mozu-Furuichi Kofun Group World Heritage Site, inscribed in 2019.

Finds & research

Excavation in 1912 indicated a wooden coffin laid directly in the mound. From inside it came two bronze mirrors, an iron sword and an iron blade, together with a great quantity of beads: 7 magatama, 6 jujube-shaped beads, 71 tubular beads in 4 strings, 501 round glass beads in 5 strings, 1,531 small glass beads in 2 strings and 684 disc beads in 1 string. The jade magatama, 5cm long, is an unusually large and rare piece. Cylindrical haniwa are said to have stood around the foot of the mound, and its moat, built up against Daisen's outer moat, is preserved underground.

Official status & archaeological view

Official status
Designated a National Historic Site on 14 May 1958 and integrated into the National Historic Site "Mozu Kofun Group" in 2014.
Archaeological view
It was built in two tiers. The World Heritage site dates it to the first half of the 5th century, Sakai City to the middle of that century, and the Agency for Cultural Affairs to the middle of the Middle Kofun period. The Agency for Cultural Affairs gives a mound diameter of 35m. Sakai City's 2025 development plan gives 35m in its list of mounds and approximately 32m in its individual site summary, so the figures differ within the same document. Whether this reflects different measurement limits has not been established.

Field notes

The official World Heritage site gives about an 8-minute walk south from Mikunigaoka Station (JR Hanwa Line / Nankai Koya Line).

World Heritage guide featuring this kofunMozu-Furuichi World Heritage Kofun A Visitor's Guide to the 49 Tombs →
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Sources

百舌鳥・古市古墳群 世界遺産公式サイト文化庁 文化遺産オンライン(世界遺産構成資産解説)堺市 史跡百舌鳥古墳群「塚廻古墳」堺市 史跡百舌鳥古墳群整備基本計画(第2期、2025年3月)(印刷4・23頁の規模表)

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