The Ghost and the Demon Sensei is Ishikawa Tale 6 of 9, an Act 2 side tale near Kawamata Village in Kushi. Tomoe has framed you and Ishikawa for killing travelers, and you hunt for her Kushi training camp. It rewards the Charm of Swift Return and 2 Silk.
Part 6 of 9 in Ishikawa's Tales
Part 23 of 66 in Tales of Tsushima
Ask around the village for anyone who has seen Ishikawa. A frightened man points you north of Kawamata, where Mongols have the sensei under attack. Clear them and climb the watchtower, then talk with Ishikawa. Head to an ambush site with him, look over the remains of a convoy and keep going. You find a woman tied up. Freeing her sets off an ambush by Tomoe's archers.
Ask around for Ishikawa and talk to the scared man. Search north of Kawamata. Save Ishikawa from the Mongols. Climb the watchtower and talk. Ride to the ambush site and check the wrecked convoy. Free the captive woman. 7. Survive the archers and talk to Ishikawa.
Tomoe later claims she lost control of her archers soon after the Kushi camp went up, and that the attack on Jin and Ishikawa went against her orders. Ishikawa does not believe her.
Dreams of Conquest
Dreams of Conquest is Ishikawa Tale 5 of 9 and the first of his Act 2 tales, starting at the Akashima Survivor Camp. You rescue a pinned-down Ishikawa and raid Tomoe's archer training camp for clues. It needs A New Horizon done and rewards the Charm of Precision and 2 Silk.
Laid to Rest
Laid to Rest is Ishikawa Tale 9 of 9, the Act 3 finale of his storyline. You team up with Tomoe and Ishikawa to stop a surprise Mongol attack on Umugi Cove. It rewards the Charm of Precision, the Midnight Shark half bow dye and the Shattered Mask of Tomoe.
The Terror of Otsuna
The Terror of Otsuna is Ishikawa Tale 7 of 9, the last of his Act 2 tales, where you hit Tomoe's Otsuna training camp and finally see her face to face. It starts west of Old Toyotama Hills and rewards the Charm of Efficiency and 2 Silk.
Image: Sucker Punch Productions / PlayStationFriends in Passing
Friends in Passing is Ishikawa Tale 8 of 9, an Act 3 side tale that starts at Jogaku Temple in Kamiagata. While hunting for Tomoe in eastern Jogaku you meet a trapper named Matsu and help her check her traps. It rewards the Charm of Fortune II and the Hidden Serpent half bow dye.