He could compete with a weakened Jigen in hand-to-hand combat, able to counter and exchange blows with him very well. As Koji continued to monitor Kawaki, he expressed concern on how it had been a while since Delta had been defeated yet Jigen had still not made a move, believing it to be unlike him especially as he had definitely learned about Boruto's Kāma and Naruto's personal protection of Kawaki from Delta. After some time had passed, he wondered why Jigen was still gone. Although he was no match for Isshiki even in Jigen's body at full power, he was capable of killing him when he was still weakened from his battle with Naruto and Sasuke and even temporarily holding his own against the fully reincarnated Isshiki, though was still soundly defeated and Amado noted while he trusted Koji with killing Jigen, he had no chance to defeat Isshiki. He is also quite agile, able to jump into the air and immediately balance himself to counter Konohamaru's Rasengan with his own, and displays great taijutsu prowess, able to easily counter all of Konohamaru's attacks and outmaneuver him enough to place a toad on him completely unnoticed. Koji also has very large reserves of chakra as he is able to use Sage Mode. He proceeded to unleash Luckily, Naruto was not there to hear this stunning news, and that is a good thing. While in Sage Mode, he can even imbue his fist with fire to consume his target in flames upon striking and perform the biggest scale Fire Release technique Sage Art: Five Fire Gods' Fan of Flames, capable of generating overwhelming amounts of flames to the point of giving Isshiki Ōtsutsuki some trouble shrinking them. Koji Kashin (in Japanese: 果心居士, Kashin Koji) is a member of Kara and an antagonist in Boruto: Naruto Next Generations. Moreover the word "Koji" means orphan in Japanese, and the character Kashin Koji is a sort of illusionist, phantom or mage from the late Muromachi period in Japanese myth.

As a clone of Jiraiya, a famous master of ninjutsu, Koji is likewise highly proficient in ninjutsu, especially Konoha's style, being even more adept than his genetic template. He can use Having watched Boruto defeat Ao, Koji summoned a toad on top of the pair, which crushed Ao to death. Having inherited Jiraiya's skill-set, Koji displays greater finesse and ability with toad-based techniques, capable of using small ones for surveillance or acting as mediums for his techniques or giant ones to crush targets and is able to use the Reverse Summoning Technique to teleport himself and others via his summons to other locations. Kashin Koji is an inner member of the organization that has spent his time patrolling the Fire Country and traveling in secrecy. As he asked Koji what his true goal is, Koji attacked him. He doubts that Naruto and Sasuke could have defeated Jigen, but he thinks that Jigen could be weakened.

He has shown outstanding, unseen levels of mastery in using Fire Release; he can use True Fire of Samadhi, that from hitting targets through small mediums, will cause the victim to spontaneously combust, strong enough to overcome a target's regeneration capabilities and never extinguish, which he can amplify by having multiple toads together, which even briefly pressured Isshiki's weakened absorption.

He has an individual mindset and acts on his own terms without fear of going against Kara. We all know that Kashin Koji is a former ninja and he believes that his fate his somehow linked to the Konoha village. Moreover the word "Koji" means orphan in Japanese, and the character Kashin Koji is a sort of illusionist, phantom or mage from the late Muromachi period in Japanese myth. A lot of fans predicted that Kashin Koji is Jiraiya – a similar fighting style, the usage of toads, the gait, the ability to get into Konoha undetected, the similarity Naruto found in him and so on. While highly doubting Naruto could defeat Jigen, even if Sasuke were to arrive and help the Hokage, Koji theorised that the battle must have exhausted Jigen tremendously, viewing this as his best chance to kill the man himself. He views this goal as siding with humanity.