改造【かいぞう】
remodeling, remodelling, reconstruction, conversion, alteration, renovation, modification, reshuffling (e.g. a cabinet), reorganization, restructuring, modding
改善【かいぜん】
betterment, improvement, kaizen (Japanese business philosophy of continuous improvement)
改めて【あらためて】
another time, again, over again, once again, anew, formally, especially, intentionally, deliberately
改正【かいせい】
revision, amendment, alteration
改定【かいてい】
revision (of a rule, price, etc.), alteration, change
改憲【かいけん】
constitutional change, revising the constitution
改選【かいせん】
re-election
改修【かいしゅう】
repair, improvement
改築【かいちく】
structural alteration (of a building), reconstruction, rebuilding, remodelling, remodeling
改新【かいしん】
reformation
改札【かいさつ】
examination of tickets, ticket gate, ticket barrier
更改【こうかい】
renewal, extension, revision
改編【かいへん】
reorganization, reorganisation
改訂【かいてい】
revision (of text), alteration, change
改組【かいそ】
reorganization, reorganisation, reshuffle
農地改革【のうちかいかく】
agrarian reform
改訂版【かいていばん】
revised edition
改変【かいへん】
change, alteration, modification
改名【かいめい】
name change
改悪【かいあく】
deterioration, changing for the worse
