今回ご紹介するのは・・・
This time I would like to introduce...
京都府向日市にある五塚原（いつかはら）古墳 （２４）
The Itsukahara Tumulus in Muko City, Kyoto Prefecture
向日丘陵を登ると「はり湖池」があり、小さな公園のふもとに石碑がたつ
Climbing up the Mukohi Hill, you will come to Harihoko Pond, where a stone monument stands at the foot of a small park.
この森にしか見えないものが奈良の纏向に通じる最古級の大型前方後円墳
What appears to be nothing more than a forest is one of the oldest large anterior-posterior tombs ,which is connected to the Makimuku in Nara.
築造はＡＣ250-290年頃（古墳時代最初期・3世紀中葉-後半頃）
It was built around 250-290 A.C. (the first period of the Kofun period, around the middle to late 3rd century).
全長約91ｍ、後円部直径約54ｍ、高さ約9ｍ
Total length: 91m, diameter of the back part: 54m, height: 9m
前方部のバチ形は纒向古墳群の東田大塚（ひがいだおおつか）古墳と、
墳丘の斜面途中にある平坦面が箸墓古墳と共通する
The shape of the front part of the mound is similar to that of the Higaidaotsuka tumulus in the Makimuku tumulus group, and the flat surface in the middle of the slope of the mound is similar to that of the Hashihaka Tomb tumulus.
墳丘は、後円部三段、前方部二段築成で畿内大王墓の基本設計になるとする説もある
There is a theory that the mound was constructed with three levels in the back of the circle and two levels in the front, and that this is the basic design of the tombs of the great kings of the Kinai region.
全体に葺石あるも埴輪はない
There is no haniwa (clay figurine) in the entire tomb.
埋葬施設は、後円部墳頂における竪穴式石室
The burial facility is a pit-type stone chamber at the top of the rear circular mound.
石室例として初めてとなる川原石の自然石の積み上げにより構築されている
This is the first example of a stone chamber constructed of natural Kawahara stone.
石室は長さ6.2ｍ・幅1.3ｍ、高さは1.5ｍ以上と推定
The stone chamber is estimated to be 6.2 m long and 1.3 m wide, with a height of over 1.5 m.
引用／京都府向日市歴史・観光サイトＨＰ、ウイキペディア
現地説明版は本格調査の前のものと思われるため平面図のみ引用しました。
Reference: Muko City History and Tourism Site HP, Wikipedia
Only the plan view is cited because the local description version is believed to be from before the full-scale survey.
翻訳／DeepL翻訳
Translation / DeepL Translation