SuperFamipony

I used to be a big fan of MLP back when I was in high school, me and my two best friends always watched the show and talked about it a lot, I remember one of them did an extensive online shopping run to replace the majority of his wardrobe with MLP t-shirts and parkas, and as for me I always partook in the community online. Then season 3 ended, we waited for season 4, I missed a few episodes and decided to wait and marathon it at the end of the season and then somehow a friend talked me out of it. I can't remember if it had something to do with the fanbase or the shorter season, or just that I thought the guy was an ass and that there were a lot of people like him in the community at the time but anyway I just kinda dropped it. Fast forward to now. It's 2017, I now live in Japan (I'm from America) and I'm engaged to be married (wedding is next month). I used to make chiptunes and sheet music and stuff and put them online a little bit. I remembered that randomly last night and then I managed to find my old channel! Now all day today I've been humming Smile Smile Smile and I thought I'd check in on the community again. I see we're on season 7 now, but on the downside every way in which I used to engage in the community has died. The forum I used is gone (Equestria Forever), the site I uploaded sheet music too and was a staff of is gone (Everypony Sings), and th site where I uploaded MP3's and found lots of other stuff to listen to is also gone. I checked Equestria Daily and they're still there and then I found you guys, so my assumption was the people running those sites moved on. I really enjoyed being part of these communities, I found a lot of similarly strange people within the fandom and made some friends and I felt like that was good for me at the time. And the show was enjoyable. So I'd like to get back to that now, but I'm nervous. My fiance is Japanese, I've got no clue at all what she would even think about this. If I had to explain to her that this was a thing that happened in America when I was a teenager, and that this was kind of a popular thing among young guys at the time, I'm honestly not sure what she would think or say lol. I love her, she loves me and she knows I'm a pretty childish (in terms of my interests) but I'm still a bit nervous. I'm not afraid that she would leave me, but I don't want to confuse her. It's something I've never talked about with her because I've been so distanced from the fandom for so long now. Basically I'm going to watch the show when she's not home and engage in the fandom online and basically keep it from her. Am I doing a bad thing by just not disclosing my interest to her? I'm not a person who keeps secrets from their partner, I'd tell her if she confronted me about it, but I'm also not going to be like "hey honey I watch My Little Pony, lots of guys in my home country do this". Have any of you been in this situation? Do you keep your interest in this series as a part of your private life? Does your significant other know that you like cartoon ponies and that the song you keep humming is about how you want to make everyone smile smile smile? A side question, are bronies a thing in Japan? That leads into my concern that if anyone were to find out, I really don't know how they would react here lol. Hence my wanting to keep it private.