The following is a translated excerpt from Hachima, a Japanese video game blog. The original can be found here. The survey was conducted on the site itself, so I wouldn’t take it as definitive proof one way or the other. See the Dangers of Online Polling for more information.
There are also some reports that Hachima is a pretty anti-Nintendo in general, so please take these results with a grain of salt.
The survey was from January 13th, 2017 18:50 ~ January 14th, 2017 18:00. 3,049 responses with 2,797 were male and 252 were female.