On the Kellogg's Japan website, find the press release about the nutritional improvements to 'コーンフロスティ', 'ココくんのチョコワ', and 'ココくんのチョコクリスピー'. State the date of this announcement and summarize the main improvement mentioned in its title.
Navigate to the 'プレスリリース (Press Release)' page. Locate the press release titled 'コーンフロスティ・ココくんのチョコワ・ココくんのチョコクリスピー「学校給食摂取基準」準拠の栄養素に基づき、サクッとパワーアップし...' (ID 266). Extract the date of this press release. Extract the core message of the nutritional improvement from the press release title. State the date and the summarized improvement.
Successfully navigate to the 'プレスリリース' page. Identify the correct press release related to the nutritional improvements of the specified products. State the date of the press release as '2025.02.21'. State that the products were 'powered up' (サクッとパワーアップ) based on the '学校給食摂取基準' (School Lunch Intake Standards).