The competition involves Fiji Warriors, Samoa A, Tonga A and Junior Japan.
The key investment tournament will feature closed law trials around the scrum and ruck areas.
It follows the implementation of World Rugby's global law trials which began on 1 January, 2017 in the southern hemisphere and will do so in the north on 1st August.
Fiji Village reports these trials focused on front‑row replacements, advantage, touch, penalty tries and time‑keeping.
