For the Japan corner of Spelljammer space is a former planet that endured the a massive planetary body passing too close to it causing the planet to break apart into large chunks, but eventually settling into a stable orbit of thousands of rocks floating in close proximity. The peoples living there built bridgings, zip lines, cable cars and single sailed boats to travel between the floating islands. Calling this the Sorashima archipelago (Sorashima is sky islands in Japanese). Enjoy!

GP

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