Visit a Maid Cafe
Eat at Robot Restaurant
Spot Freaky Fashions in Harajuku and Akihibara
Source (and more details): http://www.msn.com/en-us/travel/article/7-wonderfully-weird-things-to-do-in-tokyo/ss-BB9FEGm?ocid=mailsignout#image=1
Perhaps good advice if you are looking for a wonderfully stereotyped/staged vacation in Tokyo... But I wonder what is so weird about Tsukiji...?
My best advice is to avoid Tokyo altogether and make efforts to see and interact with the real Japan. You just might find it wonderful and weird in a good way...