In reality, the concept is more like Master/"Slave" psychologically and economically.
How many SGI members do years of unpaid labor for SGI, which is worth countless billions of dollars?
SGI has billions in the private asset holdings of the Ikeda family, all made off the backs of unpaid labor of SGI followers.
What is unpaid labor called?
Definition of SLAVE
2: one that is completely subservient to a dominating influence
So in reality its Master/"slave".
Then it became Master/Disciple, which sounds more biblical, like Ikeda is Jesus, and the SGI followers are his "Disciples".
Then for western corporate whitewash propaganda, SGI call it Mentor/Disciple.
Notice SGI kept the word Disciple, as that means a follower who does NOT QUESTION the Master.
In reality, if you are doing UNPAID LABOR for a multibillion dollar private company controlled by the Ikeda family called SGI, that is Master/"slave".
Gakkai Cult Org. slave labor = $oka-han outside of cult venues, standing around in parking lots, on street corners, late into the dark evening hours, with nothing more than a flashlight (if you were lucky to have brought your own) - sometimes in dangerous areas / Gajokai staffing cult buildings, overnight when I was in, answering the telephone, doing all the building errands and maintenance / Byakuren, serving as door flowers, serving tea, water, hot hand towels to leaders, tending to the donation envelopes / Ordinary members who "volunteer" to clean the cult buildings, serve as unofficial gakkai-mobile transportation for half a dozen people at a time, to and from cult venues, long distances away / & the list goes on.
Incidentally, I knew of a lady in the motherland (Japanese WD) who was a hardcore, really gung-ho, Ikeda devotee who managed to land a paid position with the $oka Gakkai in her area. She cleaned cult HQ bathrooms, polished cult HQ butsudans, vacuumed cult HQ Gohozon rooms and halls, wiped cult HQ tables, served cult HQ tea, hot towels to cult leaders, and routinely tended to cult paperwork office duties. Guess how much she earned from the multi-billionaire Ikeda cult org., ... legal minimum wage, not a Yen more. In fact, she also had to have a second job, working at a food factory to make ends meet for Cousin Rufus. She also volunteered
(no pay) to deliver the cult propaganda newspaper to her area every morning around 4 or 5 a.m.. Doing so also entailed the responsibility that she had to go around to collect the subscription fees for the cult org. every month. If for some reason, members didn't pay up on time (or not at all), guess who had to come up with the $-money-$, ... yep, *HER!*. Still had faith like a sparkling diamond for The Dear Leader, though.
UNPAID LABOR AND THEN SOME, TOO!!