Short for コメント欄 (komento-ran, “(Internet slang) comments section”).

(Internet slang) first comment; (interjection) first!

for the use of, for the purpose of, in case of

use; effect; means

(archaic) substitution / (archaic) price, cost, charge / (historical) shiro, a unit of land

world, society / (archaic) age, generation, era of rule

generation of a royal family / era, age, decade

charge, fare, rate, fee, price, rent / (indicating years spanning a specific period) -ies, -hundreds

substitute / alternate / representative / generation

bread, pastries, any baked good with a crust (a type of food)