Treasure tweeted out that after hearing fans' request of Ikaruga port on Switch, they purchased the stand from Daiso for 108yen to test out the vertical mode for Switch.
What's more fascinating about this is that posters of Ikaruga, Radiant Silvergun and Gun Star Heroes are reflected on Switch. Possibly hinting the port of these three games for Switch. (Credits to FantasyZone for finding this)
Earlier this year, Ikaruga was rated for PS4. Which might imply Treasure bringing their classic titles to modern platforms.