shuuritantousha wa ashita kimasu node, tachiaimasu.

The repair technician will come tomorrow, so I will be present.

Breakdown of shuuritantousha wa ashita kimasu node, tachiaimasu.

• は: topic particle
• 明日あした: tomorrow
• ので: reason particle
• 来くる: to come

Questions & Answers about shuuritantousha wa ashita kimasu node, tachiaimasu.

What does 修理担当者 mean here?

修理担当者 literally means the person in charge of repairs.

Breakdown:

• 修理 = repair
• 担当者 = person in charge / person responsible

So in natural English, this could be:

• the repair person
• the technician
• the person handling the repair

It sounds a bit formal or businesslike compared with a very casual word like 修理の人.

Why is は used after 修理担当者?

は marks 修理担当者 as the topic of the sentence: as for the repair person...

So the first part is setting up what we are talking about:

• 修理担当者は明日来ますので = As for the repair person, they will come tomorrow, so...

Using は often gives a feeling of introducing known or relevant information as the topic.

If you used が instead, it would focus more directly on who is coming:

• 修理担当者が明日来ますので、立ち会います。

That is also possible, but は sounds more like you are talking about the repair person as the topic of the situation.

Why is there no particle after 明日?