user
Instruction
Answer the question based on the provided table.


Table
Table Title: 'International competitions' regarding 'Daisuke Matsunaga'
Table Content:
| Year | Competition | Venue | Position | Event | Notes |
| --- | --- | --- | --- | --- | --- |
| 2012 | Asian Junior Championships | Colombo, Sri Lanka | 2nd | 10,000 m walk | 45:03.01 |
| 2014 | World Race Walking Cup | Taicang, China | 2nd | 10 km walk (junior) | 39:45 |
| 2014 | World Race Walking Cup | Taicang, China | 5th | Junior team | 23 pts |
| 2014 | World Junior Championships | Eugene, United States | 1st | 10,000 m walk | 39:27.19 CR |
| 2015 | Asian Race Walking Championships | Nomi, Japan | 3rd | 20 km walk | 1:19:08 |
| 2015 | Universiade | Gwangju, South Korea | 3rd | 20 km walk | 1:22:06 |
| 2016 | Asian Race Walking Championships | Nomi, Japan | 1st | 20 km walk | 1:19:01 |
| 2016 | Olympic Games | Rio de Janeiro, Brazil | 7th | 20 km walk | 1:20:22 |


Question
What were the two achievements of Daisuke Matsunaga during the years 2012 and 2014?


Answer Format
The final answer should be a sentence and use the following format:
```json
{
    "answer": "your_generated_sentence_here"
}
```
rule
["Daisuke Matsunaga made his first impact at the 2012 Asian Junior Athletics Championships, taking a silver, then won the 2014 World Junior Championships in a championship record of 39:27.19 minutes."]