It seems that lately, I've been having more and more trouble remembering these kanji in general. As far as this sole kanji is concerned though, the problem lies in the fact that I simply can't imagine a group of pent-in people glued together, or a variation on that theme. I think I will spend some extra time this evening on thinking about a nice image for this kanji, who knows, perhaps I will suddenly be hit by a burst of creative genius.

Well there are expressions about people who are always together. For instance two best friends who always go everywhere together, you can say something like "they are always stuck together" or "they act like they are glued together". For me, this is how I see the glue primitive being used.

Zarxrax, thanks a lot for your response in general and for bringing the idea of two people stuck together to my mind. If Cirion's example fails, I will elaborate on that thought.

Cirion, I think I've just fallen in love . Thanks a lot for your idea about those stamps. Not that I ever use stamps, but for some reason it is ridiculously easy to make up a mental image for your little story .

I was thinking of glue and box as being the important visuals and collection being the auditory clue for the keyword, but then again in my Japanese class I've already learned stamp as 切手.

Not knowing future primitives is a problem in any story - you won't know till you get there unless someone warns you. Maybe Roderik can use some other group of things that can be glued and put in a box. Pictures in a scrapbook? Tiles on a backsplash in the shape of a square? My example is how a stamp collection my friend inherited was stored.

Anyway, I'm glad you like the idea and hope it works out for you Roderik. I sometimes have the same problem where Heisig's examples can't stick.

Hmm, I just think of team rocket a.k.a. ロケット団. As you can tell, I've been playing the　
ポケモン games in 日本語.

Out of all of the post 500 Kanji, I believe this one was the easiest for me. Why? I'm a massive Haruhi Suzumiya fan. And Haruhi's club is, of course, called the SOS団.

So if you still aren't getting it, try tying it into some game or anime you've played or watched. Even if you have to go into the Japanese versions.