蹴込み is read as けこみ (kekomi) and means riser.
けこみ
kekomi
けこむ
to kick in(to)
けりこむ
to kick into (e.g. a ball into the goal)
ける
to kick
もうしこみ
application
ふりこみ
discarding a tile that becomes another player's winning tile
ひとごみ
crowd of people
みこみ
side of a structural member
いきごみ
ardor
なぐりこみ
raid
うりこみ
sales promotion
もちこみ
bring-your-own (e.g. food and drink)
ぜいこみ
including tax (of a price)