（103）茨城県かすみがうら市の風返（かぜがえし）稲荷山古墳（全長78ｍの前方後円墳）
(103) Kazegaeshi Inarizan Kofun (78 m long post-anterior round tomb) in Kasumigaura City, Ibaraki Prefecture.
後円部から前方部を望む
前方部（横から）
前方部から後円部を望む
後円部（横から）
風返稲荷山古墳は、前方部が西を向く前方後円墳で
全長約78m、後円部直径約43m・高さ約10m、前方部幅約57m・高さ約8m
This tumulus is a post-anterior-round mound with the main axis of the mound to the east and west, and the anterior part facing west.
The main axis of the mound is oriented east-west, and the anterior part faces west. 78m in length, 43m in diameter and 10m in height at the back, 57m in width and 8m in height at the front.
埋葬施設は2か所でくびれ部と後円部
くびれ部には箱形石棺があり長辺約1.9m、短辺約0.9mで円頭大刀、金銅製耳環とガラス玉等が出土。
さらに約1m離れた場所から、轡類、杏葉、辻金具、鏡板、鞍金具など馬具も出土した。
後円部では南に開口する横穴式石室があり全長約9m。
後室・前室・羨道部・前庭部からなる複室構造をもち後室には、奥壁に沿って奥箱形石棺、左右の側壁に沿って東箱形石棺、西箱形石棺の計3基が配置されている。
奥箱形石棺からは金銅製耳環、
東箱形石棺からは頭椎（かぶつち）大刀、円頭大刀、銀装刀子等、
西箱形石棺からは金銅製耳環等が出土。
また、前室の奥から直刀、鉄鉾、鉄鏃、銅鋺、杏葉、雲珠、辻金具、鞍金具、刀子等が寄せられたような状況でまとまって出土。
さらに、南側から弓弭（ゆはず）、刀子、刀装身具、直刀、須恵器が出土。
これらのことから、本古墳は、6世紀後半から7世紀中頃にかけて4回の埋葬行為が行われたと考えられている。
There are two burial facilities, one at the neck and the other at the back of the circle.
In the neck, there is a box-shaped sarcophagus, 1.9m long and 0.9m short, with a large round-headed sword, gilt-bronze ear rings, and glass beads. From a distance of about 1m, gags, apricot leaves, tsuji metal fittings, mirror plates, saddle fittings and other horse equipment were also excavated.
In the rear circle, there is a stone chamber with a side hole opening to the south, about 9 meters long.
It has a multi-chambered structure consisting of a back chamber, front chamber, enclosed passage, and vestibule. In the back chamber, there are three box-shaped sarcophagi: an inner box-shaped sarcophagus along the back wall, an eastern box-shaped sarcophagus along the left and right side walls, and a western box-shaped sarcophagus.
Gilt-bronze ear rings were excavated from the inner box-shaped sarcophagus, kabutochi swords, round-headed swords, and silver-armored knives from the eastern box-shaped sarcophagus, and gilt-bronze ear rings from the western box-shaped sarcophagus.
In addition, a straight sword, an iron spear, an iron arrowhead, the cover with a copper handle, an apricot leaf, a cloud bead, metal fittings, saddle fittings, and a sword were excavated from the back of the front chamber.
In addition, from the south side of the tomb, bow nocks, swords, sword accessories, straight swords, and Sue ware were excavated.
Based on these findings, it is thought that this tomb was buried four times between the late 6th and mid 7th centuries.
築造は、6世紀末と推測される
It is estimated to have been built at the end of the 6th century.
引用／かすみがうら市歴史博物館HP・茨城県教育委員会HP
Quotes from the website of the Kasumigaura City Museum of History and the website of the Ibaraki Prefectural Board of Education
翻訳／Deep pro