One of the main reasons I believe that Jpop often doesn't catch the interest of as many people overseas as Kpop does is its lack of accesibility. Most Kpop artists are more than interested in growing their overseas fanbase and it's pretty easy to find Kpop songs on sites like YouTube and iTunes with a simple search. However with Jpop, depending on the artist it can still be a little difficult to find their content if you don't live in Japan.
There are still many Japanese labels who only make their artist's music videos available to Japanese audiences or worse; don't let their music videos be uploaded online at all. A lot of Japanese artists do have their music up to purchase on iTunes these days but most only make it available to buyers in the Japanese store so if you're a foreigner your only option is to get the physical CD imported from Japan which not everyone can afford for every single release.
Of course there are ways around these obstacles *cough* e.g. proxy services, hiding your IP address, sneaky fan uploads *cough* but if you're just getting into Jpop for the first time you probably don't want to go through all of that trouble! So I've complied a list of a few of the more easy to access Jpop boy groups; taking into account factors such as their music and videos being available outside of Japan, how much information can be found on them in English, and how involved they've been with their foreign audience in the past.
Notice how there aren't any Johnny's Entertainment groups in this list. Then let's go!
