The statement is broken into two claims: the Nikkei 225 increased, and the KOSPI increased on December 22. The provided sources offer strong, consistent evidence for both claims.For the Nikkei 225, a high-authority Google Finance source explicitly states it increased by 1.97%. This is corroborated by another credible source, TradingEconomics, which states the index rose on the specified date. For the KOSPI, a high-authority Yahoo Finance source directly confirms it increased by 1.71%. This is independently verified by another source, MacroMicro, which provides daily data showing the closing value on December 22 was higher than the previous day's close.There is no conflicting evidence among the relevant sources. Several sources were disregarded as they either pertained to an incorrect date, a different stock index, or the provided summary lacked the necessary performance data. The convergence of specific, affirmative data from multiple independent and authoritative financial sources provides a high degree of confidence that the statement is true.