No. He clarifies that it is not Kingdom Hearts' version of Shibuya. In fact, he kinda reinforces the idea that it is TWEWY:
Nomura: It does look like it. But there's more meaning in the fact that it is not Shibuya (written with kanji 渋谷), but Shibuya (written with katakana シブヤ). Also, Sora promised Neku and the others in KH3D that he would meet them in Shibuya (written in katakana), but that doesn't mean it's directly connected to this movie.
Shibuya, that is the UG Shibuya where the Reaper's Game is played, is referred to as シブヤ in TWEWY and Kingdom Hearts. Then there is the real (RG) Shibuya that is called 渋谷.
Nomura would have just flat out said no if it wasn't TWEWY.