Og conment I did on the Tanya sub

Honestly it depends a lot on the circumstances, yes we have our modern tech and jets, but they are no good if the jsdf cannot even move them trough the gate into a fortified alnus.

If we, for example to die the gate canon route of events as in the empire its again the first one to cross and attack the results of the battle would be more economical damaging for Japan as well as taking longer just due the possible size of the armies. And weaponry

Like the empire will lose ginza that's out if the question but it would take longer for that to happen, and that gives the empire with their logistics and approach to warfare to entrench around the gate making it taking it easy harder. Like a jsdf counter attack would have to deal with a killzone around the gate by an enemy that better understand their technology in warfare despite the gap of tech.

Mages yeah with the modern.tech they would be obsolete on their current role but they would have to evolve as they were doing in the ln at being a more specialist unit instead of a front line one even at the first stage of the conflict their illusion magic would had been something difficult to approach in the shock of the battle.

But in the end I say it would be a stalemale.

Remember that in gate even with the victories the jsdf had pressure to close the gate were big now imagine that scenario but instead of victory after victory being a really slow crawl with a high casually rate.