Charlie,
You have got to make up your mind about Dina dimalchusa. In one comment, you treat as the be all and end all and in another you say “well….”.
Besides, it is likely that dina demalchusa relates to the country one “dwells” in. These boys certainly did not dwell in Japan.
And what happened to Y. W. Editor’s contention that 99.99% of what you said was factually incorrect based on specific research he has done. Apparently being a PhD does not mean one can do research beyond a google seacrh.