Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Team | Competition | Category | Appearances\nStart | Appearances\nSub | Goals | Team Record |
| --- | --- | --- | --- | --- | --- | --- |
| Japan | 2006 AFC U-17 Championship qualification | U-15 | 1 | 0 | 0 | Qualified |
| Japan | 2006 AFC U-17 Championship | U-16 | 4 | 1 | 4 | Champions |
| Japan | 2007 FIFA U-17 World Cup | U-17 | 1 | 2 | 2 | Round 1 |
| Japan | 2008 AFC Youth Championship qualification | U-18 | 4 | 0 | 2 | Qualified |
| Japan | 2008 AFC U-19 Championship | U-19 | 1 | 1 | 0 | Quarterfinal |
| Japan | 2013 EAFF East Asian Cup | Senior | 2 | 0 | 3 | Champions |
Question:
name the earliest competition to have a sub.
Answer:
2006 AFC U-17 Championship