To tell the truth, I do not understand what this relationship means.
JMIA is a society to promote the Japanese motor sports industry.
JRP(Japan Race Promotion, Promoter of Formula Nippon and FCJ(Formula Challenge Japan)) doesn't want to use the Japanese chassis.
Therefore, GTA promoted the sales of the JAF-GT300 Mother chassis plan to GTA in 2009.
It was a union chassis plan with the tubular frame chassis(sorry, not CFRP monocoque) and the carbon crash structure.
However, GTA announced the introduction of "reasonable" FIA-GT3 afterwards. There is a rumor that Nissan develops FIA-GT3 spec GTR, too.
Therefore, this mother chassis plan seems not to be adopted.