Kurozuka Kofun (黒塚古墳) is one of mausoleum located in Nara. It is 130m long front circle back square Kofun constructed in late 3rd century. There is a museum that displays the relics found in here.
Tourist Info.
No parking. There is a museum is for restroom.
The Museum
Time:9:00 to 17:00
Close: Holiday and Monday (When Monday is a holiday, close on Tuesday)
Admission: Free.
Access
0. at Nara Station.
1. use JR Sakurai Line to Yanagimoto Station.
2. walk east (20 min.)
30 min
New Wave Samurai Movie. 
映画好き集まれ！ 
Kurozuka Kofun is about 130m long front square back circle Kofun. The Square is 48m and The back circle is 72m diameter, and 6m tall.It was constructed from the late 3rd century to early 4th century.
This Kofun was excavated in 1997. Unlike other Kofun, you can enter this Kofun.
Kofun Museum
It displays the relics such as stone mirrors. It has also re-created chamber of Kofun.