Formations
Trains were formed as four-car and permanently coupled 3+3-car sets, as follows.4-car sets
Car 2 was fitted with two pantographs, and car 3 was designated as a mildly air-conditioned car.3+3-car sets
Cars 2 and 5 were each fitted with two pantographs, and car 5 was designated as a mildly air-conditioned car. One 3100 series car, 3651, is inserted in 3000 series four-car set 3007.History
40 3100 series cars were built between 1964 and 1967 for use on the Hankyu Takarazuka Line. Initially not air-conditioned, the fleet was retro-fitted with air-conditioning between 1975 and 1981. The last remaining set, four-car set 3150, was withdrawn following its final run on 8 July 2016.References
{{Hankyu trainsets Electric multiple units of Japan 3100 series Train-related introductions in 1964 ja:阪急3000系電車#3100系 600 V DC multiple units 1500 V DC multiple units of Japan Alna Koki rolling stock