What is this?

Answer : Tokyo Tower

答え：東京タワー

It is unclear just by looking up from ground against sun. 

逆光で下から見上げるとわかりにくい。

Incidentally, I went up it.Of course, I want up by stairs.

ちなみに、東京タワー登りました。もちろん、階段で。

It has 600 stairs that go up to big observation deck that it's  150m in height.

150mの高さにある大展望台までの600段。

I looked at surrounding buildings becoming smaller and smaller and the skeleton of Tower before my eyes.

小さくなる周辺の建物たちとタワーの骨格を間近に見れました。

It is insipid to take the elevator! I recommend it.

エレベーターで行くなんて味気ない！オススメです。

Tokyo Tower was more retro by saving on electricity.

節電モードで、レトロ感も増していた東京タワーでした。