久

a long time (since the last time)

(in a) long time

eternity

permanence

endurance

endurance

durability

it's been a long time

cross sign

semipermanence

long (time that has passed)

eternal

for many years

sky

long time (since the last time)

Genkyū era (1204.2.20-1206.4.27)

Kyūan era (1145.7.22-1151.1.26)

Bunkyū era (1861.2.19-1864.2.20)

stamina

for a long time

after a long time

it's been a long time

permanence

pride goes before a fall

pride goes before a fall

protracted war

Saku University

Kenkyū era (1190.4.11-1199.4.27)

coeval with heaven and earth

heaven and earth are eternal

kumeuta

for a good while

marathon training in physical education classes in Japanese schools

Kurume University (abbr)

semipermanent

permanence

permanency

permanent strain

Jōkyū era (1219.4.12-1222.4.13)

continued luck in the fortunes of war

Jōkyū War (1221)

Enkyū era (1069.4.13-1074.8.23)

Kurume University

Empress's Birthday (esp. as celebrated prior to WWII)

removal of dissolute sons from the family register (Edo period)

perpetual motion

permanent disqualification

perpetual motion machine

durability

permanent preservation

making permanent

permanent and immutable

permanent

permanent storage (radioactives, data, etc.)

eternity

perpetual bond

permanent current

permanence

permanent measure

Kokune Corporation

Jōkyū War (1221)

permanent revolution

Kyūju era (1154.10.28-1156.4.27)

permanent establishment (in tax law)

Yakushima cedar (esp. one over 1000 years old)

Amami pine (Pinus amamiana)

permanent hard water

permanent employment

permanent establishment (in tax law)

durable (consumer) goods

Yakushima sika (Cervus nippon yakushimae)

retired (uniform) number

Kurume Institute of Technology

permanent tissue

marrying to become a housewife

Kurihama Reform School

version for permanent preservation

permafrost

endurance race (motorsport)

durable goods

spotbelly greenling (Hexagrammos agrammus)

permanent ceasefire

permanent tooth

durable (consumer) goods

permanent magnetic field

removing hair permanently

permanent magnet

extending over a long time

permanent voter registration list

dogged perseverance

Yakushima macaque (Macaca fuscata yakui)

everlasting

forever

Amamikyu (Ryukyuan religion creation goddess)

long-cherished hope

Junkudo (Japanese bookstore chain)

permanent storage

permanent magnet generator

Kurihama Special Needs School (older name style)

permanent magnet synchronous motor

not having met or contacted someone for a long time

to apologize for a long neglect of friends (apologise)

to apologize for a long neglect of friends (apologise)