Park A

Visibility: small, hand size, handy
pretty illustration in the cover and in almost every single pages.
Easy to read that it is a diary because of the cover.
Daily plan, monthly plan, annual plan, memorandum pages, account pages

Feedback: helps to remind important events or schedule.
Users can use all the various functions (daily, monthly, annual plans) at the same time.

Affordance: helps to remind important events or schedule.
Easy to see what schedules you have today or in the month.
helps to raise ability to manage time.

Mapping: open the diary when you have something to write down.
Go to the part that you want to use (daily, monthly, annual plans, etc.)
Write down what you want to remember whenever you see it or what you want to keep in secret.
You can always open it and see what you have done and what you should do next.

Constraints: need for a pen or a pencil to write something down on the diary.
you can not write down the whole memory-> lack of spaces
If you lose it, it is really hard to find it.
Because the diary is really a private thing, you can be anxious about disclosure of your privacy

Habituation: after you use a page, you can fold the page or put something between pages to find the page directly.