Obama Nishigumi is the remaining castle town of Obama Castle. Originally, Takeda Motomitsu built a castle near here. In 1601, Kyogoku Takatsugu built the castle at the current castle. The castle town has divided into 3 parts. Nishigumi has merchant houses, restaurants and temples are located to protect the castle.

There are many traditional houses still remaining here that has a view of Samurai era.