This chapter really pissed me off as I was reading/translating it. The way they tricked Jeff into eating whale meat is like, the most disrespectful thing Yamaoka has done before or since.
He's been disrespectful before, but in those cases, he's usually targeting stuffy customs or obnoxious folks who had it coming. This time, he took advantage of Jeff's innocence and trust.
Bad show, Yamaoka. This is not how you argue a point. Go sit in the corner.