In Another World with My Smartphone: Volume 3

Stalwart as ever, 16-year-old Mochizuki Touya heads off to the far eastern land of Eashen with his party in tow.
For what purpose? The Matriarch of the Fairy Clan wishes to delve into some ancient ruins, of course! But it's never quite that simple for Touya and his friends, oh no. The party is thrust into the midst of a clash between the warlords Takeda Schingen and Tokugawa Ieyahsu while a nefarious necromancer makes his move in the shadows...
©2015 Patora Fuyuhara; English translation copyright 2017 by J-Novel Club LLC; Original Japanese edition published in 2015 by Hobby Japan; Cover illustration by Eiji Usatsuka.