As an expert translation post-editor, your task is to improve the Thai translation of the Japanese source text below.

Japanese Source:
{japanese_source_text}

Current Thai Translation:
{thai_translation_text}

Instructions:
Step 1: Start by saying "Proposed Improvements:".
Then, identify improvements that would make the Thai translation more faithful to the Japanese source and more fluent in Thai.

Step 2: Start by saying "Improved Translation:".
Then, output the complete improved Thai translation.