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Gakujoshi (gaku-choshi, or "Gagaku (court music) tuning")
 was introduced to solo koto performance technique during the 19th century
 for accompanying folksongs and other popular songs.  Gakujoshi consists
 of the pentatonic scale: D, E, G, A, C.  The tuning contrasts with
 the standard solo koto tuning, hirajoshi, since
 it does not contain any half-step intervals between any adjacent
 strings.  Gakujoshi is similar in character to the tuning nogijoshi which also uses only wholetones.
 
   Here are the pitches to which the strings of the koto are tuned
 in gakujoshi when the tonic of the scale is D:
 
  
 
 
 |  string:  | 
      | 
     1  | 
     2  | 
     3  | 
     4  | 
     5  | 
     6  | 
     7  | 
     8  | 
     9  | 
     10  | 
     11  | 
     12  | 
     13  | 
  
 
 |  Gaku-choshi | 
      | 
     D4   | 
     G3   | 
     A3   | 
     C4   | 
     D4   | 
     E4   | 
     G4   | 
     A4   | 
     C5   | 
     D5   | 
     E5   | 
     G5   | 
     A5   | 
     
 
   
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