The "Otakumouse" idea started in the middle of 2008 and 2009. Those were the years when I was just starting the figure collecting hobby. It was originally called "Needlemouse Otaku" because I'm using the name "Needlemouse" as my web/artist name for 10 yrs, but then I told myself the name was just too long to pronounce and remember.
I really want to preserve the word "mouse" because it is already a part of my personality and I also want to keep the word "otaku" because it encapsulates all of the topics (games, anime, toys, etc) that I want to showcase in the site. So I just decided to replace the word "needle" in the name "needlemouse" with the word "otaku" giving me the name "Otakumouse".
The "mouse" emblem has been around for 7 yrs and is originally a part of my web/artist name "Needlemouse". Since I already have a "logo", I mostly focused on designing the logotype of the Otakumouse brand. I did 4 major iterations of the logotype since 2008 and I was actually laughing at myself when I saw my earlier designs because they look unprofessional and funny.
Today, I'm happy with my current logo and I'm still not sure if I will be doing another logo re-design anytime soon. One thing's for sure though, the logotype will change but the "emblem" will definitely remain.