Sorry, I fell behind on this, lol. And, I think Jaiden’s actually doing a bit more than I probably could. I’m not familiar with Japanese, and I didn’t even know there was a phonetic grid, so yeah, lmao.
But, I agree with him that letters are easier to do first. Just keep in mind the… ‘vibe’, I guess, of your culture (the guttural or sauve or whatever vibe). Though, I will comment that the city you have, Hulcrahta, gives me kind of ‘airy’ or ‘breathy’ vibes. So, lots of H’s, HUH’s and HAH’s, and breathy sounds. That’s just me though, and that’s just going off of one name that might not even be related to the language, lol.
And, since you have K and M involved, you could even go with a slightly guttural (or ‘deep breathy’, if you want, lol) sound. You have the guttural crackle of the K and then the low rumble of the M to spice things up. Then, with the importance of otters and canines in the culture, maybe include sounds that sort of mimic the names of the animals (Random examples that you can ignore if you want: Othra, Kanhtin, Kamhta, Morhtol).
Just throwing out ideas here, lol.