い
I — throat / voice focus
The kana い is the requested I focus, placed at the throat as a voice-oriented attention point. The source tradition supports the vowel as a practice sound, but the throat coordinate and ether/speech tags are an explicitly schematic body projection.
Point 2 of 9 in Kototama Sound Body — A-I-U-E-O vowel foci
Cross-tradition overlaps
No overlapping points are registered for this point.
Sources
Masahilo M. Nakazono, The Source of Present-Day Civilization (scholarly_modern)
Modern Kototama source for the vowel/sound-rhythm system; it does not independently establish this centre coordinate.
Kototama Sound Practice as taught by M.M. Nakazono (secondary)
Identifies I as one of the five Mother/Half-Mother vowel sounds and gives its voiced pronunciation practice.