well first of all... don't just count by Yen price itself...
because in HK model shop... 100Yen = HKD$6+
but in Japan model shop... 100Yen = HKD$7.7...

so even in Japan is cheaper but since the exchange rate is more expansive for some models...

HOWEVER, since the troops and horse are always expansive in HK, so I rather buy it in Japan in this case...
部隊兵 in HK always selling for HKD$30+ and I can get it for around HKD$23 in Japan so I rather buy it from them...