上達 and 究める: gradual improvement and deep mastery
Compare improvement conditional on practice with deep mastery of a field, separating conditions, completed changes, and the scope of mastery.
Improvement over an earlier level with 上達
上達 (じょうたつ) refers to improvement in skill. The example 「毎日練習すれば少しずつ上達する。」 is translated as “Practicing every day leads to gradual improvement.” 毎日練習すれば makes daily practice a condition for gradual improvement. It does not report that daily practice or improvement has already occurred.
The example 「以前より料理が上達して、家族に喜ばれた。」 is translated as “My family was pleased that my cooking skills had improved.” Cooking improved compared with before and pleased the family. Separate this result from the practice condition in the preceding example.
Deep mastery with 究める
究める (きわめる) refers to mastering or pursuing a field deeply. The example 「職人は一生をかけて漆塗りの技を究めた。」 is translated as “The craftsperson devoted a lifetime to mastering lacquerwork.” 究めた reports completed mastery of lacquerwork over the craftsperson's lifetime. This person's time does not set the duration required for mastery in every field.
The example 「一つの分野を究めるには好奇心が欠かせない。」 is translated as “Curiosity is essential if you want to pursue a field thoroughly.” Curiosity is required for pursuing a field deeply. That requirement does not establish completed mastery of every field.
Degree of improvement and depth of mastery
上達 emphasizes improvement over an earlier level; 究める emphasizes the depth and scope of mastery in a field. Some improvement does not establish mastery, and pursuing depth can also involve improvement.
Do not impose universal stages or fixed durations. Separate the conditions of practice and curiosity from the stated improvement in cooking and the craftsperson's mastery.
How does gradual improvement with 上達 under the daily-practice condition differ from the lacquerwork mastery expressed by 究めた?
Show the answer and why
The first links daily practice as a condition with gradual improvement. The second reports deep mastery of lacquerwork over the craftsperson's lifetime. Compare improvement with mastery in a field without treating the practice condition as an already completed improvement.