2015.03

Yggdrasill （のちのAthena）GRAND OPEN

2015.10

Norn by Yggdrasill GRAND OPEN

2016.01

拡大移転 Group Yggdrasill 創立

2017.10

Zeus by Yggdrasill GRAND OPEN

2018.02

Zeus by Yggdrasill 拡大移転

2018.02

Artemis by Yggdrasill GRAND OPEN