Kagome Kagome / Solving the mystery of Oni.
(The tea ceremony master in Kyoto, Hori Sobon illustrates the mystery of Oni.)

Kagome Kagome Kago no naka no Tori wa
Itsu Itsu deyaru? Yoake no ban ni
Tsuru to Kame ga subetta.
Ushirono shomen dare ?
(AIFF 306K)

Kagome, Kagome, the bird in the cage,
when will you come out?
In the evening of the dawn,
the crane and turtle slipped.
Who stands right behind you now?
- A child's play song

What does "Oni" mean ?
"Ni" in Japanese means "Two". So, "Oni" means two "O"s or "OO". As "O" is the same as zero, two zeros put together become "░" infinity.

At the center of the infinity mark is a cross which signifies a spiritual purification. This cross, "X", is also Kimon ---the gate of the Oni, an especially difficult point.

Urashima Taro, in the form of a crane, KANZEON represents "O"---the spirit. (In Japanese, zero is pronounced "Rei", which means spirit)
A turtle (KANNON), the princess of the dragon Shrine at the bottom of the sea, also represents "O"---the spirit---but this is a different kind of spirit from the previous one.
These two spirits meet and get together and the dance of the crane and the turtle (KANZEON and KANNON) begins. The dance is the infinite movement (░).
If you pull the two ends of a piece of string in which a bow has been tied, the two loops (OO) will disappear but a knot will remain. In the same way, two "O"s are jointed together and become one. Considering the two loops of the bow to be the crane (3, from the tale of Urashima Taro. Taro, having turned into an old man, turns into a white crane when he opens the third casket.) and the turtle (6, the shape of the turtle back from the tale of Urashima Taro. The princess of the dragon Shrine at the bottom of the sea turned into a turtle), we can see the two become one. With the crane as the number 3, the turtle as number 6, we can see 3+6=9---an absolute truth.
Ichinyo, the Buddhist word meaning truth, is different, but here truth is born out without question (3,6,9).
In Japanese 3 phonetically is "MI", 6 is "ROKU" and 9 is "KU". MIROKU, the Buddha that, it is said, will appear in the future is a special one. When the time of MIROKU comes, the time for writing down the facts of the work of the Oni will also come.