If you're looking for an Sixt rental car near Osaka Kansai Intl airport, the closest location can be found at 1 Senshu-Kuko-naka, Tajiri-cho, and you can call them on +81 72 456 8780
No, Sixt does not currently offer pickup services from Osaka Kansai Intl airport (KIX). However, their nearest location is 1 Senshu-Kuko-naka, Tajiri-cho which is approx. 0.867mi away from Osaka Kansai Intl airport and accessible by public transport.