The best example is erasable pens that are called, "frixion", which has special types of ink with an eraser on the top of it. You can write, erase, re-write, and erase till you can be satisfied with your own writings.

Another example is a thin post it labels.
Although 3M is an Ameican company, 3M Japan Group has produced its original items in Japan.
Those tiny and thin posts it labels are convenient compared to using large ones.

You may use it as a highlighter so easily. And most of them are colorful which is entertaining.

And stapleless staplers! It gets sometimes worry some to think how many staplers are left.

You don't have to worry about a thing if you use a staple less staplers! It will not bite your fingers and much safer than the regular ones!