The following is a concise summary of the text:
The text is a transcript of a video by a Japanese fitness trainer who introduces a simple diet that anyone can do. He shows how he lost almost 5 kg in 8 days by changing his cooking method, choosing Japanese food over Western food, and eating protein first. He also shares a funny video of a "waiting god" who stops him from eating tempting food. He encourages his viewers to try his diet and see the results for themselves. He ends with his catchphrase "Let's get on with it".
Here are the key facts extracted from the text:
1. The text is a transcript of a video about a simple diet that anyone can do.
2. The speaker claims to have lost just under 5 kg in 8 days by following three methods: changing the cooking method, changing Western food to Japanese food, and changing the order of eating food.
3. The speaker explains the concept of glycemic index and how it affects blood sugar level and fat storage.
4. The speaker also shares a humorous video of a god of waiting who helps people resist temptation when dieting.
5. The speaker encourages the viewers to try the diet and gain confidence, energy and fun from it.