Nintendo are simply amazing at creating new IPs. That margin of a win, incredible.

What?  Read the OP before posting dude, the voters are listed by name AND company.  In fact, there are no devs from Nintendo itself in the list.  Also, your argument the casual wins would suggest the mobile games would triumph.  But all the top ones are console games.  Also the statement that devs work standard hours and therefore can't play core games is ludicrous.  Most gamers are older now and work regular hours.  Hasn't stopped the sale and popularity of massive games that require large time investments.  And the majority of games to get more than one vote are all "core" games, not casual.

If you have played it you would know that splatoon is NOTHING like a casual game.

mobile games werent allowed in this poll or else you would see at least one mobile game

SPLATOON CONTINUES TO SLAY OUR ASSES!!!!!!

Nintendo really outdone themselves with this game and saved 2015!

Itagaki voted for a baseball card game.

I don't take the list entirely seriously, because there's some obvious joke entries. Still some interesting information though.

direct quotes from the article linked by the OP

"Notably, while smartphone games are present, they’re definitely not dominant, and the games that received the most preferences are all console titles."

and again

"It’s worth mentioning that the fact that console games are prevalent among the preferences of the developers involved, it isn’t because creatives working on mobile games weren’t included. As a matter of fact, many of the respondents do work on smartphone titles. Looks like console games are still alive and well in Japan, at least among those that create them."

Japanese people have to work the most from all the first world countries i will go with my other argument

What's else is that you can see which mobile games got votes. Splatoon is a big deal right now in Japan. It's become quite a hit, so it's not surprising that people really like it.