The opposite (west) end of the park borders on Shibuya, where you can visit NHK Broadcasting Ceter, headquarters for Japan's public television network a must for anyone wishing to see how samurai epics are made.
Shibuya is a place where you can visit the headquarters of the Japanese public TV network.
Under U.S. immigration laws, they are permitted. in general, to travel to and from the United States without restriction.