The values that were checked by the store and modified by MarketEnabler aren't checked for
downloading anymore.
Now it's divided into two parts: the search part (when you lookup the name on the Store) and the download part (whether it will let you download it in your country).
For the search part, I believe it checks all three: IP, account and SIM operator. That's whenever you hit the Search button and type text to get the app listing.
Warning: the Play Store caches pretty much all queries. So if you do change any of those three then try again and find out it still doesn't work, try changing the text a bit.Now, for the actual download (on the app page), it just checks Google account country, which you can hit Menu > Accounts to change.
Which basically boils down to:
- If you want to download NepColl, access it directly (
https://play.google.com/store/apps/details?id=net.gree.android.pf.greeapp57531a ) on your phone, chances are it won't let you on the web store. Then Menu, Accounts, pick a Japanese account and download.
- If you want to see NepColl on the search results, get a VPN, pick a Japanese account, and run Market Enabler (which I haven't tried).
I'm using this self-made and rudimentary script to change my operator code instead of MarketEnabler. Run as root.
#!/system/bin/sh
/system/bin/setprop gsm.sim.operator.numeric 44010
/system/bin/setprop gsm.sim.operator.alpha "NTT docomo"
/system/bin/setprop gsm.sim.operator.iso-country jp
/system/bin/setprop gsm.operator.numeric 44010
/system/bin/setprop gsm.operator.alpha "NTT docomo"
/system/bin/setprop gsm.operator.iso-country jp
echo $(/system/bin/getprop gsm.operator.alpha)
echo $(/system/bin/getprop gsm.sim.operator.alpha)
echo $(/system/bin/getprop gsm.operator.iso-country)
echo $(/system/bin/getprop gsm.sim.operator.iso-country)
echo $(/system/bin/getprop gsm.operator.numeric)
echo $(/system/bin/getprop gsm.sim.operator.numeric)
/system/bin/pm disable com.android.vending
/system/bin/rm -r /data/data/com.android.vending/cache/*
/system/bin/rm -r /data/data/com.android.vending/app_sslcache/*
/system/bin/pm enable com.android.vending
echo "Done."
It's temporary and won't persist after a reboot (though it can be configured to be so). I'm using SManager to run it.
Disclaimer, run at your own risk, I can't be held responsible if this utterly destroys your phone, make backups, yadda, yadda.

Two different queries, respectively before and after running the script above.tl;dr: you need at least a market link (or the Gree app, which has them) and a Japanese Google account to get an app, and a Japanese IP and Gree account to play Gree games.