Midori's kraft paper envelopes have a perfectly rough texture. The string closure adds a fun nostalgic touch to the envelopes and it is very robust and will easily survive your trips.
Kokuyo Century Edition Thin Paper Notepad A5: Dot Grid
Kokuyo Century Edition Thin Paper Notepad A5: Plain
Omoriyuko Letter Set: Shiro Sumire (Motoko Omori)
Oeda Letterpress Noble Message Pad (Pale Blue/Pale Green/Pale Pink)
Miki Tamura Letter Set: Write a Letter