Using Budget Rent-A-Car Japan's reservation form, set the pick-up location to '羽田空港店' (Haneda Airport Store) in '東京都' (Tokyo Prefecture) and the drop-off location to '新大阪東口店' (Shin-Osaka East Exit Store) in '大阪府' (Osaka Prefecture). Then, proceed to the next page to select the rental dates and times. Do not select dates or times.
Navigate to the homepage: https://www.budgetrentacar.co.jp/ In the 'レンタカーのご予約はこちら！' (Rent a car reservation here!) section, select '東京都' (Tokyo Prefecture) for the pick-up location (id: 477). Select '羽田空港店' (Haneda Airport Store) as the specific pick-up store (id: 526). Select '大阪府' (Osaka Prefecture) for the drop-off location (id: 535). Select '新大阪東口店' (Shin-Osaka East Exit Store) as the specific drop-off store (id: 571). Click the '日付を選択する' (Select Date) button (id: 575). Confirm that the page has navigated to the date and time selection interface.
Successfully navigate to the main reservation form on the homepage. Correctly select '東京都' and '羽田空港店' as the pick-up location. Correctly select '大阪府' and '新大阪東口店' as the drop-off location. Successfully click the '日付を選択する' button. The agent's final state is on the date and time selection page, not the homepage or an error state.