While in Tokyo you can take the Shinkansen and get off at Nagoya shortly. Here you can walk around, find the castle and walk for a while but try not to miss the Atsuta Shrine.
It is a shrine of the Shinto religion, the first Japanese pre-Buddhist religion (with which he has been living for thousands of years). It is believed that this place was established under the reign of Emperor Keiko (71 to 130) and is commonly known as Sama or venerable Atsuta Atsuta.
This complex of 200 thousand m2 which receives millions of visitors every year has always been a very revered site. One of the oldest Japanese chronicles say that this place contains one of the imperial jewels, the sacred sword of Susanoo. According to certain sources Yamato Takeru was in possession of several relics, including the sword, and his death everything was transferred to the sanctuary.