I went with my wife, but then decided not to go up. If I remember correctly, it would have cost me something like 3000 yen per person to go to the top floor. I've been up many towers (Tokyo tower, willis tower, petronas tower, the beer opener one in Shanghai, Taipei 101, Eiffel tower), and I found it to be overpriced, especially given the location of the tower. Of course exchange rates at the moment of visiting may affect my opinion.