 The Takumakai must have agreed as he received his "kyoju dairi", or teaching license, from the Takumakai in 1980 and then received a menkyo in the sword or Ona-ha Ittō-ryū portion of the headmaster's system in 1987, which the headmaster asserted contained the heart of the system.Out of convenience this system is sometimes referred to as 'Takeda-den' or 'Sokaku-den' Ona-ha Ittō-ryū to denote its difference from the main-line Ona-ha Ittō-ryū tradition.Reputedly only six people are said to have been taught this system by Tokimune.