It is nothing magnificent compared to the other towers all over Japan. It seems like it was more for publicity than anything.
It was built in 1957, is a 147.2 metre high TV tower with an observation deck at a height of 90.38 metres. There is also a digital clock installed at 65 metres from the ground.
If you can’t see any other tower then I recomend going to see it but it is nothing you should go out of your way to see it; especially when there isn’t an event going on, it is nothing special.