importance, consequence, significance

obi - the sash worn with a kimono / paper wrapper (on books, CD, etc.)

to know, be aware of / to learn, acquire, / to be acquainted with, to know (someone) / (colloquial, in the negative) to care in the least about, to be concerned with,

stem or continuative form of 知る (shiru) [godan]

Alternative spelling of 物知り: a person with broad knowledge, a knowledgeable person

band, belt

belt / sash / band / girdle

importance

ignorance is bliss

complete denial of knowing (an incident in question)