He appears in many of the cases taking place in the late 20s and 30s.
The inspector in the Poirot mysteries is typically Captain Arthur Hastings, Poirot's close friend and frequent companion in solving cases. Chief Inspector Japp is another recurring inspector in some of the Poirot stories.
Hercule Poirot has two friends; Captain Arthur Hastings and Miss Lemon. Another close associate was chief inspector Japp
A pair of lumpy, brown gloves that were knitted by his wife. Poirot obviously dislikes them and therefore insists that he will only wear them when he attends church (which he never does).
In his first case we get to meet him through Captain Hastings, the rest of the characters being episodic. In the cases taking place in the 30s (which make up the majority of the novels/short stories), Scotland Yard Inspector Japp and personal secretary to Mr. Poirot - Miss Lemon are also a constant, besides Hastings and Poirot.
We are not told of where Japp was born and educated. However, he lives in West London and the actor in question puts on a somewhat London (though not Cockney) accent. The actor (Phillip Jackson) who plays Japp was born in Nottinghamshire so his native accent is northern English, which does show through slightly.
The recommended reading order for the Poirot books is to start with "The Mysterious Affair at Styles" and then follow the publication order of the books by Agatha Christie featuring the detective Hercule Poirot.
No, you do not have to read Hercule Poirot books in order to fully understand the series. Each book is a standalone mystery that can be enjoyed on its own.
Amanda Japp is 5' 7".
Stephanie Japp is 172 cm.
Inspector Japp was created in 1921.
Mikel Japp was born in 1952.
Mikel Japp died in 2012.