Thread:JouXIII/@comment-37031238-20181014025610/@comment-26369387-20181016185526

Those two should work:
 * 海驢一族, Ashika Ichizoku(Ashika Clan)
 * this one is sea lion.
 * 川獺一族, Kawauso Ichizoku(Kawauso Clan)
 * this one is otter.

As for my secret... It's not really much, I use this site called Denshi Jisho(電子辞書, which means "electronic dictionary"), as well as experience of self-learning Japanese around 10 years(more or less) and comparing how certain names of characters, techniques, places and terms are constructed in canon!Naruto, as well as several other manga-series.

That's about it, I guess.