Wabun Code
Encyclopedia
The is a form of Morse code
Morse code
Morse code is a method of transmitting textual information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment...

 used to send Japanese
Japanese language
is a language spoken by over 130 million people in Japan and in Japanese emigrant communities. It is a member of the Japonic language family, which has a number of proposed relationships with other languages, none of which has gained wide acceptance among historical linguists .Japanese is an...

 text. Unlike International Morse Code
Morse code
Morse code is a method of transmitting textual information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment...

, which represents letters of the Roman alphabet, in Wabun each symbol represents a Japanese kana. For this reason, Wabun code is also sometimes called Kana
Kana
Kana are the syllabic Japanese scripts, as opposed to the logographic Chinese characters known in Japan as kanji and the Roman alphabet known as rōmaji...

 code.

When Wabun Code is intermixed with International Morse code
Morse code
Morse code is a method of transmitting textual information as a series of on-off tones, lights, or clicks that can be directly understood by a skilled listener or observer without special equipment...

, the prosign
Prosigns for Morse Code
In Morse code, prosigns or procedural signals are dot/dash sequences that have a special meaning in a transmission: they are a form of control character...

 DO (-..---) is used to announce the beginning of Wabun, and the prosign SN (...-.) is used to return to International Code.

Wabun Code was famously used to transmit the message "NIITAKA-YAMA NOBORE 12 08" on December 2, 1941, signalling the go-ahead of the Japanese attack on Pearl Harbor
Attack on Pearl Harbor
The attack on Pearl Harbor was a surprise military strike conducted by the Imperial Japanese Navy against the United States naval base at Pearl Harbor, Hawaii, on the morning of December 7, 1941...

.

Chart

Mora
Mora (linguistics)
Mora is a unit in phonology that determines syllable weight, which in some languages determines stress or timing. As with many technical linguistic terms, the definition of a mora varies. Perhaps the most succinct working definition was provided by the American linguist James D...

 
Code Mora Code Mora Code Mora Code Mora Code Mora Code Mora Code Mora Code Mora Code Mora Code Punctuation Code
a ア --•-- ka カ •-•• sa サ -•-•- ta タ -• na ナ •-• ha ハ -••• ma マ -••- ya ヤ •-- ra ラ ••• wa ワ -•- Dakuten
Dakuten
, colloquially ten-ten , is a diacritic sign most often used in the Japanese kana syllabaries to indicate that the consonant of a syllable should be pronounced voiced. Handakuten , colloquially maru , is a diacritic used with the kana for syllables starting with h to indicate that they should...

  ◌゛
••
i イ •- ki キ -•-•• shiシ --•-• chiチ ••-• ni ニ -•-• hi ヒ --••- mi ミ ••-•- ri リ --• (wi ヰ) •-••- Handakuten ◌゜ ••--•
u ウ ••- ku ク •••- su ス ---•- tsuツ •--• nu ヌ •••• fu フ --•• mu ム - yu ユ -••-- ru ル -•--• n ン •-•-• Long vowel ◌̄ •--•-
e エ -•--- ke ケ -•-- se セ •---• te テ •-•-- ne ネ --•- he ヘ me メ -•••- re レ --- (we ヱ) •--•• Comma 、 •-•-•-
o オ •-••• ko コ ---- so ソ ---• to ト ••-•• no ノ ••-- ho ホ -•• mo モ -••-• yo ヨ -- ro ロ •-•- wo ヲ •--- Full stop 。 •-•-••

Expanded Katakana Wabun Chart

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