kamadashi wa ashita desu.

The kiln unloading is tomorrow.

Breakdown of kamadashi wa ashita desu.

• は: topic particle
• です: to be
• 明日あした: tomorrow
• 窯出かまだし: unloading fired work from a kiln

Questions & Answers about kamadashi wa ashita desu.

How do you read 窯出し here?

It is usually read かまだし.

• 窯 = かま = kiln
• 出し comes from 出す = to take out / bring out

So 窯出し means something like taking the pottery out of the kiln or the kiln unloading. It is a specialized word used in pottery or ceramics contexts.

Why is は pronounced wa instead of ha?

Because when は is used as the topic particle, it is pronounced わ.

So in this sentence:

• written: 窯出し は 明日 です
• read: かまだし は あした です

This is one of the most important pronunciation exceptions in Japanese.

What is the role of は in this sentence?

は marks 窯出し as the topic.

The sentence structure is basically:

• As for the kiln unloading, it is tomorrow.

So 窯出しは means as for the kiln unloading or regarding the kiln unloading.

This does not mean 窯出し is the grammatical subject in exactly the same way as an English subject. It is better to think of は as setting the topic that the rest of the sentence talks about.