Pitch variations are created with the left hand fingers by pressing the strings in between the frets (Chû).
The left fingers are controlling the pitch bending as indicated by the line behind each note.
Pitch bending with vibrato
The left fingers are controlling the pitch bending as well as vibrato.
Pitch bending followed by a vibrato
After the pitch bending a vibrato is performed.
Pitch bending variations
Always the line indicates the pitch bending.