I've heard mixed reports on how well the unlocked via "coding" on-board AM radio on the i3 sounds while driving around. I stumbled across
which is Japanese. 729 kHz seems to a valid station there:
List of radio stations in Japan - Wikipedia. That threw me off as I don't think we in the US have AM stations on frenquncies that are non-increments of 10 kHz.
If it's like the i3, it might be worthless while driving around. Listen to the 1st video.
AM radio works fine on my '13 Leaf SV w/premium as it did w/my previous '13 Leaf w/both packages. I use the AM radio several times a week. In some days, I flip to it multiple times/day mainly to listen for/to news.