O mark

Japan employs a number of related symbols (◎ ○ △ ×) in a system that expresses degrees of affirmation.

A bullseye "◎" (nijūmaru; 二重丸) is often used for "excellent", the circle is a plain affirmation, the triangle "△" (sankaku; 三角) means "so-so" or "partially applicable", and the "×" expresses disagreement.

The hanamaru is frequently written on tests if a student has achieved full marks or an otherwise outstanding result.

It is sometimes used in place of an O mark in grading written response problems if a student's answer is especially good.

Unicode provides various related symbols, including: U+2B55 ⭕ HEAVY LARGE CIRCLE has both text and emoji presentations, as shown in the table.

A Sony DualShock 2 controller for the PlayStation 2 game console, with the ◯ button visible on the right. In many games released for the PlayStation console line in Japan, the O mark is used as a means to confirm choices in user interfaces , whereas the X button is used instead in Western releases. [ 1 ]