| Clue | Source | Date |
|---|---|---|
| All-in-one meal that often includes rice | New York Times | 04 Mar 2023 |
| Compartmented Japanese lunch | New York Times | 28 Mar 2022 |
| Japanese container with several compartments for sushi or cold food | The Telegraph General Knowledge | 05 Aug 2018 |
| Japanese lunch option | New York Times | 16 Jun 2018 |
| Japanese lunch option |