Second Degree Belt in Chinese / Japanese...

二段 is a Japanese Kanji word that literally means “second degree.”

二段 is the second black belt rank in Japanese martial arts.

The first Kanji means two or second in Japanese.

The second Kanji means step, grade, rank, or level.

二段 can also be written as 弐段. This version just uses a more complicated Kanji for the number two.

ニダン is the name Nidan in Japanese.

This is not the same as 二段 (nidan), which is the second degree (black belt) in Japanese.

Note: Because this title is entirely Japanese Katakana, it should be written by a Japanese calligrapher.

六段 is the Japanese title for the 6th Degree or 6th Level.

This applies mostly to martial arts and earning the title of a 6th-degree black belt.

The first character is simply the number 6.
The second character is “dan” which is often translated as “degree” in the context of Japanese martial arts. 六段 means grade, rank, level. When a number is in front like this, it refers to a senior rank in martial arts or games of strategy such as go, shogi, chess, etc.

三段 is a Japanese Kanji word that literally means “third degree.”

三段 is the third black belt rank in Japanese martial arts.

The first Kanji means three or third in Japanese.

The second Kanji means step, grade, rank, or level.