Star Alliance - 1:20 enough for TG to JL connection at NRT?

Two separate tickets. Will be arriving TG in F, departing in JL C.

I know I have to clear security.
I know I have to change terminals.
I have no bags.

Doable?

I suppose the answer is "yes" if things are on time and if I am quick to get through security. And I suppose the answer is "no" if things go wrong.

Answered your own question.

I did a similar transfer between the two terminals about a year ago. I remember that the wait for the transfer bus was pretty long (more than 10 min for sure). The drive itself also took 10 min or so.

Answered your own question.

Well, I appreciate the deep insights! I would love to know about hands on experience from the sages who have travelled the route!

Sorry about that. Well I think u will be fine if everything is on time but you may not make it if the security is taking a while. :)