Japanese

edit
For pronunciation and definitions of くさなぎのつるぎ – see the following entry.
草薙剣
[proper noun] the "Grasscutting Longsword", one of the three sacred treasures comprising the Imperial Regalia of Japan
Alternative spelling
草薙の剣
(This term, くさなぎのつるぎ (kusanaginotsurugi), is the hiragana spelling of the above term.)