"AMBITIOUS JAPAN!" can be found in their 2005 album "ACT II". it's their 9th studio album!
i guess it's V6's first time to release their material in Korea, since i don't think i've seen YesAsia list Korean versions of their material. but it's cool that they are going to! i think Arashi & KAT-TUN are the only other ones that release stuff in Korea.