Gate opens in japan, monsters etc. JSDF get involved, brings over tanks, fighter jets etc. Tech > Magic. That's how they kill dragons and get the kingdom or w/e from invading earth through the gate.

Thanks in advance

Also if anyone remembers a light novel with a similar premise, forget if korean or chinese. guy starts buying stuff to bring through(don't think there's magic but some weird alien shit later on) befriends giant wolf early on and elf like people

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perhaps it's Gate: Jieitai Kanochi nite, Kaku Tatakaeri

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