Easy Survival In Another WorldIsekai Raku Raku Survival: Seizon Skill Tsuwamono no Ore ga Bishoujo Shiri to Kurasu Mujintou Seikatsu; 異世界らくらくサバイバル～生存スキル強者の俺が美少女四人と暮らす無人島生活～; Isekai Rakuraku Survival: Seizon Skill Kyousha no Ore ga Bishoujo Yonin to Class Mujintou Seikatsu; Easy Survival in Another World: With My Robust Survival Skills, I’ll Live on an Uninhabited Island With Four Beautiful Girls

More than ten years have passed since a means of transporting individuals from Earth to another world was developed. High school student Kakeru Satomi was taught survival techniques and wisdom by his mountain-dwelling grandfather. Kakeru was sent to another world together with 100 other adventurers of the same age in order to take part in a training program to become an adventurer, but the portal device that linked Earth and the other world vanished right after their transfer...!With the way back to Earth blocked, thus began a dangerous life of survival on an uninhabited island in another world!!