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Even if the Yggdrasill can only travel a light year every eight minutes, she'd be at the edge of known space in a bit over 5 hours if she started from Yamatai... makes me wonder if I should have Toshiro do some exploring, though he's more likely to go north than south, to avoid the Mishuu...
With the Elysians to the East and the Mishuu to the South distracting the Army's forces, have the North and West been explored at all?