Why did Kido accede to working for the Yakuza in SF in The Man in the High Castle?
Did he lack enough net worth to pay his son's debts? S4 exhibits him living in a typical high-rise apartment.
Even if he did, why didn't he seek assistance from the 3-star admiral whom he saved or the Crown Princess? Couldn't they have loaned him money, or at least goaded the Yakuza to waive his debt or allow more time for re-payment?
I don't think it's shameful to seek assistance when your son has PTSD caused by military service.