Here is my analyse of the etymology of « arigato gozaimasu » : « a socotra blooded tree aged 2500 years  » (see austronesian languages), شجرة الخزم او العراب او دم الاخوين

gozaimasu : خزيمة بن ثابت , أبا عمارة ….arigato : العراب

Both words , arigato and gosaimasu are the same word ARU (ALU = to exist , ALLAH) with the word GOD

وَأَنَّهُۥ تَعَٰلَىٰ جَدُّ رَبِّنَا مَا ٱتَّخَذَ صَٰحِبَةً وَلَا وَلَدًا.

https://www.youtube.com/watch?v=LQeet5-2uBY

Here the name of God and the word KURSI in the Holy CoranThe civilisation of YONAGUNI and the JOMON culture are very very old .

https://en.wikipedia.org/wiki/Yonaguni_Monument