It appears to have been a very off-hand experience. He explained the process in a talk with Herman Li of Dragonforce.
Yesterday the set started shipping out to the people who pre-ordered it and even though the release date is tomorrow (Wednesday 9th), many have already received it, some are going to get it today outside of Japan as well.
LEGEND – METAL GALAXY And “BABYMETAL Live Selection – Odyssey To The METAL GALAXY” To Be Broadcast On WOWOW
The first will be broadcast in April (day 1) and May (day 2), and the 2nd on March 15th.
The album and band charted lower this year than in 2014, 2015, and 2016 (tied with 2017) on Billboard.