Kanai Anzen is a type of omamori

Omamori

Omamori are Japanese amulets dedicated to particular Shinto deities as well as Buddhist figures. The word mamori means protection, with omamori being the sonkeigo form of the word, "to protect.".-Design and function:...

, or Japanese amulet of the Shinto

Shinto

or Shintoism, also kami-no-michi, is the indigenous spirituality of Japan and the Japanese people. It is a set of practices, to be carried out diligently, to establish a connection between present day Japan and its ancient past. Shinto practices were first recorded and codified in the written...

 religion. Its purpose is to promote good health and to help those with illnesses.

Literally, kanai anzen means "Please keep my family from harm," and you can see this written upon ema

Ema (Shinto)

are small wooden plaques on which Shinto worshippers write their prayers or wishes. The ema are then left hanging up at the shrine, where the kami receive them. They bear various pictures, often of animals or other Shinto imagery, and many have the word gan'i , meaning "wish", written along the side...

 as well as omamori suzu

Suzu

is a round and hollow Japanese Shinto Bell that contains pellets that sound when agitated. Suzu come in many sizes, ranging from tiny ones on good luck charms to large ones at shrine entrances.- Role in Shinto :...

(bells). In the form of an omamori and suzu, this prayer is carried on one's person.