牛込神楽坂駅
Ushigomekagurazaka eki
Nine syllables.
Nine moras.
Then I wondered what's the longest station (narrowing it down to trains only) name. I included the word for station (駅), but did not count it.
南阿蘇水の生まれる里白水高原駅
minami asomizu no umareru satohakusui kougen eki
in kumamoto prefecture
19 syllables.
22 moras.
which looks like this.
It really runs into the plains! Don't you feel like singing Sound of Music!?