it really depends who your friends are. if they are all in japan then you should match the times they should be home. if its all times, it shouldn't make a huge difference. if you use hashtags, then bots will spread it out for you. i can't track the results, and can't tell if they are clicking or not, so it's impossible to know if its really working. other than people favoriting it, and or buying it right after i post.
---Mike Savad
MikeSavad.com