I don't know exactly but I check out enough places I always know about anything that comes west that interests me. I usually know enough about it far in advance of even when they officially announce a western release.
I was following this game for quite awhile the same way I will have been following Toki To Towa for quite awhile before it gets here.
PSN ID: sled_dogs76 60" Pioneer Kuro Elite PRO151FD, Yamaha RX-V3900 A/V Receiver, Oppo DV983-H player. Coming soon: 2 Seaton Submersives from Mark Seaton
Ironically for me it was from Gameinformer's ( GI recently give an average critical review) early preview and as I browsed my subscribed issue, I immediately was so stoke to see the beautiful Japanese animation monster art style that I have been familiar since that first time when I saw the purple like weird looking Totoro on my ancient vhs!