実績を積む

You usually pair this with the particle を.

It functions as a transitive verb phrase.

Often, you use it with adverbs like 着実に (steadily).

コツコツと (bit by bit) is another great partner.

You can use it in the present continuous 積んでいる.

This shows you are currently working on your reputation.

It fits perfectly in a self-introduction.

It also works when praising a junior colleague.

"You are really stacking those wins!"

Just don't use it for small, daily chores.

Stacking laundry is just 積む.

Stacking sales targets is 実績を積む.

Think about a freelance designer on Upwork.

Every 5-star review is a brick in their stack.

They are 実績を積む-ing their way to higher rates.

Or think about a pro gamer.

Winning tournaments builds their 実績.

In a job interview on Zoom, you might say:

"I have built a track record in digital marketing."

This sounds much more impressive than just "I did marketing."

It suggests you have receipts for your claims.

You can see this on LinkedIn bios often.

"Built a track record of 20% growth annually."

It is the language of winners.

Use it in professional settings primarily.

It is great for performance reviews.

Use it when discussing long-term hobbies too.

If you have been coding for five years, you have 実績.

It is perfect for talking about company history.

"Our company has a long track record in this industry."

It builds authority instantly.

Use it when you want to sound serious and focused.

It shows you value progress and history.

Avoid it for one-time lucky breaks.

If you win the lottery, that is not 実績.

That is just luck (運).

Don't use it for things that don't have a 'result.'

Walking your dog every day is a good habit.

But we don't usually call it 実績を積む.

Unless your dog is a world-class show dog!

Avoid using it in very casual, slangy chats with best friends.

It might sound a bit too 'corporate' for a bar hang.

"Hey man, I'm stacking achievements in eating pizza!"

Your friends might give you a weird look.

Wait, 経験を積む (accumulate experience) is a real phrase!

But they are not the same.

経験 is just about being there and doing it.

実績 is about the *results* you actually achieved.

You can have 10 years of experience but zero achievements.

Don't be that person.

実績 is the object you stack (積む).

If you use 増える (to increase), the particle must be が.

積る (tsumoru) is for snow piling up naturally.

積む (tsumu) is for you actively stacking things.

Don't let your career just 'snow over.'

キャリアを築く (Build a career).

This is more about the whole structure of your life.

成果を上げる (Produce results).

This is more about a single, specific win.

実績がある (Have a track record).

This describes the state of having the stack already.

場数を踏む (Gain experience through many situations).

This sounds a bit more 'battle-hardened.'

功績を残す (Leave a great merit/achievement).

This is for very big, historical-level wins.

着実に実績を積む (Steadily build a track record).

This is the most common professional version.

着実 means steady and reliable.

実績を積み重ねる (To stack and layer achievements).

This emphasizes the layers of hard work.

華々しい実績を積む (To build a brilliant track record).

Use this for the superstars and high-flyers.

地道に実績を積む (To build a track record in a low-key, honest way).

This is very humble and respected in Japan.

Is it too formal for an interview?

Not at all, it is actually perfect.

It shows you are result-oriented.

Can I use it for video games?

Yes! Gamers use it for 'achievements' often.

Especially when talking about pro-level stats.

What is the difference between seika and jisseki?

Seika is the 'fruit' of your labor (output).

Jisseki is the 'actual record' of those fruits over time.

Does it sound arrogant?

Only if you brag without having the actual stack.

If you have the receipts, it just sounds confident.