Meanings

finite set

focusing (of light)

complementary set

collection

platelet aggregation

intelligence gathering

information-gathering satellite

campaign rally

caucus

labor rally

overconcentration (esp. of population, cultural and political institutions, etc. in Tokyo)

highlights

recruiting (inviting application for) through personal connections

(many things) gathering like clouds and vanishing like mist

meeting and parting

lexicography

day on which many companies hold shareholders meetings (to limit disruption by would-be blackmailers)

to begin to catch (attention, etc.)

ability to attract customers

collected waka poems (of a single poet)