You should definitely visit Meiji Shrine when you go on a trip to Tokyo. It is one of the most beautiful and interesting places I have been to and I strongly recommend it to any passionate traveler like myself.
The shrine is the resting place of the first emperor of modern Japan, Emperor Meiji, and his wife. It was built in 1920. In addition to the religious buildings, there is the Treasure House which has personal belongings of the emperor on display. The garden of the shrine is gorgeous especially in June when the irises bloom.