Upleveling on the other hand is different. Rquirements increase if u uplevel any g1-g5 items. g6 and above don't show any requirement increase when upleveled
for those who don't know upgrading, it's making g1 to g2, g5 to g6 , etc,.
done only through crafting, obviously will cost a lot.
upleveling is increasing level of items using DJ, LMS, SMS, SJ ,LMS
Note: DJs are usefull to decrease level of item of any g5 or lower grade item if it's level is above lvl 1 and u want to reduce requirements by reducing it's level. using it on g6 and above items is kinda illogical.