hoshoukikan wa ichinen desu.

The warranty period is one year.

Breakdown of hoshoukikan wa ichinen desu.

• は: topic particle
• です: to be
• 一年いちねん: one year
• 保証期間ほしょうきかん: a warranty period

Questions & Answers about hoshoukikan wa ichinen desu.

How do you read 保証期間は一年です?

It is read:

ほしょうきかん は いちねん です
Romanization: hoshō kikan wa ichinen desu

Notes:

• 保証期間 = ほしょうきかん
• は is written ha but pronounced wa here
• 一年 = いちねん
• です = desu

In normal writing, it is usually written without spaces:

保証期間は一年です。

What does 保証期間 mean exactly?

保証期間 is a compound noun meaning warranty period or guarantee period.

It is made of:

• 保証 = warranty, guarantee
• 期間 = period, term, length of time

So together, 保証期間 means the period during which the product is covered by the warranty.

Why is は pronounced wa instead of ha?

This is one of the most common beginner questions in Japanese.

When は is used as a topic particle, it is pronounced wa, not ha.

So in this sentence:

• written: 保証期間は一年です
• spoken: ほしょうきかん wa いちねんです

This is just a standard rule of Japanese grammar. The spelling stays は, but the pronunciation changes when it marks the topic.

What is the job of は in this sentence?