Assassin Saga

The main character Kaori Saito was a spy for the japanese government, but he was shot and killed by a traitor in his organization. Then Kaoiri was re-incarnated into a normal iseki world, but only he was not gifted with any talent. This is a series about a former japanese spy surviving in the iseki world, and taking on the occupation of assassin.
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The story is told by a deity, using 3rd person.