Kingdom Hearts 3D [Dream Drop Distance] Ultimania, the official guidebook for Kingdom Hearts 3D [Dream Drop Distance], released earlier this week in Japan. Kingdom Hearts 3D [Dream Drop Distance] Ultimania is said to contain a lot of information and secrets about both Kingdom Hearts 3D and the future of the Kingdom Hearts series. We will keep updating the front page with more information about the book as it appears.
takaturtle from KH13 has scanned all pages from the Ultimania containing interviews with Tetsuya Nomura, or other staff who worked on Kingdom Hearts 3D. Since these pages contain some spoilers about the game, we won't embed them here-- instead, please click this link to see them. A partial translation of the Tetsuya Nomura interview, using these scans, has appeared online, and again, this interview contains spoilers. For this reason, please click here to read it.
Update 1: Lightning_XII from GameFAQs has translated even more of the interview scans. These interview excerpts contain a lot of Kingdom Hearts 3D spoilers, so proceed with caution! If you're ready, you can read it here. We will keep updating as more interview excerpts appear.
Update 2: Peterko from KH13 has uploaded various scans from the Ultimania, in great quality! To be specific, these scans contain the Tetsuya Nomura interview, and the list of 20 secrets from within the game. Thanks to him, you can view these scans by clicking here.