Originally Posted by
jskang07
Would I be denied entry at immigration if there is no space on my passport the landing sticker?
No. If the airline is doing its job, it will deny you boarding, and you won't even get close to immigration.
If you make it as far as Japanese immigration and you literally have no space in the passport, you will probably be denied entry. If you have no empty pages but space on a page for a sticker and a stamp ... and you're charming and lucky, you might get in.