Hatamoto

“Your fief is increased from five hundred koku to three thousand. You will have control within twenty ri.” A ri was a measure of distance that approximated one mile. “As a further token of my affection, when I return to Yedo I will send you two horses, twenty silk kimonos, one suit of armor, two swords, and enough arms to equip a further hundred samurai which you will recruit. When war comes you will immediately join my personal staff as a hatamoto.” Yabu was feeling expansive: a hatamoto was a special personal retainer of a daimyo who had the right of access to his lord and could wear swords in the presence of his lord….

— Shōgun, Chapter 6

Emphasis mine.