After lunchtime, I found time to search foreign articles to discuss gamification.
To find them, I used the service in the following:
JustReachOut – Find and pitch journalists who are actually interested in you.
https://justreachout.io/?ref=producthunt

I only need to put a keyword in the box and email address.
Then, the service emailed me lists of articles.
I checked more than 10 articles.
I found two media which have both English and Japanese version.
I like the following article.
How Applebee’s uses gamification to retain staff, boost sales
http://goo.gl/jsXTQX
Today I approached one writer via LinkedIn message.
I hope to hear from a reporter soon.
But, only one writer is not enough.
Therefore, I will contact several reporters on the following days…