..."rarger rout" ~~ clearly [conventionally supposed] Japanese pronunciation of "lager-lout" ~~ a composite, now obsolescent English idiom for a young binge-drinker who behaves in a disorderly/aggressive manner in a public place. At one time, strong lager was the fashionable drink among such misbehaving young men: I am not sure if this is still the case. In any event, "lager-lout" is, as I say, now a somewhat weary locution which has been superseded by "binge-drinker".

~Michael~