any truths here?

He's basically just said that Kija Brown is writing a book on the goings on at Wenge having been an administrator or promoter.
Wenge Musica was made up of many people so JB Mpiana's opinion alone cannot be relied upon, most of the top leaders including JB Mpiana  have given their account of what transpired so we know more than half the truth of what led to the break up. Werrason has not said anything so his account needs to be taken into consideration too,hope Kija Brown has Werrason's side of the story.

In my opinion the reason about Werrason wanting Japonais is absolute nonsense, Japonais was already in Wenge Musica BCBG 4X4 as the 4th soloist by the time the band split up, he played the generique on JB Mpiana's first solo album Feux de l'amour and also created part of the guitar partitions for Titanic that is why he replayed the same Titanic intro on Wenge Musica Maison Mere's first generique Force Intervention Rapide.

My friend who claimed to have written lyrics to Werrason said: the point where the farewell was decided came during the last European tour of the band, where Papa Wemba also appeared as a guest, and he said on stage that JB is the true leader. Can this information be credible?

indeed,that event surprised and frustrated other musicians,and then events of last months of 97 and the very tense attempts of negotiations nailed it,with jb and werra almost fighting

Didin't Papa Wemba know it is unpolite to say such things in front of big audience?

Anyway, in a book it was written that Wenge 4x4 was kept together by the younger son of Mobutu. He didn't let them split, but when the rebellion in the east started, he was busy with his military obligations, and while he was away, Wenge memebers didn't have to care about him any more and due to exsisting tentions they split.

that' s true the split could have happened in 1992/1993 after a europe tour as there was already an argument between jb werra and blaise over their roles and its advantages,makaba was also vital in solving that matter