wookinguibento no kanpo wo kirokusuru.

完歩 literally means completing a course on foot or finishing a walking route/event.

A few useful points:

• 完 = complete
• 歩 = walk / steps

So this is not just any kind of completion. It specifically refers to successfully walking the whole course.

It is often used for things like:

• walking events
• long-distance walks
• pilgrim routes
• stamp rallies or fitness challenges

It sounds more specific than a general word like 終了 (finish/end).

No. In this sentence, 完歩 is functioning as a noun.

The structure is:

• ウォーキングイベントの完歩 = completion of the walking event
• を = marks that whole phrase as the object
• 記録する = to record

So the sentence is built around recording something, and the thing being recorded is the completion of the walking event.

Here, の links two nouns:

• ウォーキングイベント = walking event
• 完歩 = completion on foot

So ウォーキングイベントの完歩 means something like:

• the completion of the walking event
• completing the walking event

This is a very common use of の in Japanese. It does not only mean possession like John’s book. It can also show:

• category
• relation
• context
• what something is about

Here it shows that the 完歩 is the one related to the walking event.

を marks the direct object of the verb.

The verb is 記録する (to record), and the thing being recorded is:

ウォーキングイベントの完歩

So the structure is:

• [ウォーキングイベントの完歩] を 記録する
• record [the completion of the walking event]

A helpful way to see it is that を does not attach only to 完歩 by itself. It marks the entire noun phrase before it.

記録 is a noun meaning record or recording, but it is also a verbal noun. That means it can combine with する to make a verb:

• 記録 = record
• 記録する = to record

This is extremely common in Japanese. Other examples are:

• 勉強する = to study
• 運動する = to exercise
• 予約する = to reserve

So 記録する is the normal verb form here.

The plain form 記録する can be used in several ways:

• as a neutral statement
• as a heading or label
• in app/interface language
• in instructions or descriptions

So depending on context, it might feel like:

• record the completion of the walking event
• to record the completion of the walking event
• records the completion of the walking event

If this appeared on a button, menu item, or app screen, the dictionary form is very natural.

Yes, the subject is omitted, which is very normal in Japanese.

Japanese often leaves out the subject when it is clear from context. So this sentence could imply different subjects depending on where it appears:

• I record the completion...
• You record the completion...
• The app records the completion...
• Record the completion...

In many real-world cases, especially UI text or short descriptions, Japanese prefers to leave the subject unstated.

It is written in katakana because it is a loanword-style expression based on English:

• ウォーキング = walking
• イベント = event

Katakana is commonly used for:

• borrowed words
• modern-sounding terms
• event names
• fitness or promotional language

A native Japanese alternative might exist in some contexts, but ウォーキングイベント sounds very natural for a public event, health campaign, or organized activity.

No. Normally, Japanese is written without spaces.

The standard writing would be:

ウォーキングイベントの完歩を記録する。

Spaces are often added only for:

• learners
• readability
• teaching materials
• special formatting

So the spaced version is helpful for study, but it is not the usual native-style writing.

Usually, no—not if you specifically want to emphasize walking.

• 完歩 = completing a route on foot / by walking
• 完走 = completing a race or course, often associated with running

For a walking event, 完歩 is the better match because it highlights that the participant walked the whole course.

So 完歩 fits the situation more precisely.