Japanese mafia groups in Dublin

While I was waiting a bus, I saw a German car and these Japanese speaking men around. Do they related with the damage of my brass whistle recently? I found more burnt damage on my brass whistle as well as some holes are uneven and now making the higher tone than the upper hole tones. So, it was significant to find something totally wrong going on after my purchase. And are these Japanese related with Leon Stork's gang from Munich?