Grand Duke Sergei Mikhailovich of Russia
data unavailability; lack of data; shortage of data
practical experience; actual experience
subject (of memo, email, etc.); title
optical device; optical element
superiors; big shots; higher-ups; VIPs; dignitaries
plume; ornamental feather
to be into something (e.g. a hobby)
communication path; communication channel
Edo (shogunate capital, now Tokyo); Yedo
what the hell are you saying?
electronic; electronic formula
smoking a cigarette without holding it with one's fingers; holding a cigarette in one's mouth
samurai receiving this much rice as a fee; offering of rice cake containing this much rice; person receiving this amount of money as a salary