Many sets come out in Japan first. Here is every Japanese release TCGKing tracks, next to its English or European edition when the publisher has announced one.
No. Some Japanese products stay Japan-only, others reach the English market weeks or months later, sometimes under another name or split differently. A line marked “Not announced yet” means the publisher has not announced an English or European edition so far.
TCGKing compares the publishers' official Japanese and English catalogs: the same product code first, then the same title and product type. A product is only paired when the match is clear.
For most publishers the English edition is the one sold in Europe, often on the same day as in North America. When a publisher gives a separate European date, the calendar shows it.