Challenging a Financial System I Couldn’t Fully Understand — An Unexpected Two-Week Business Trip to London in My 8th Year

Whoa! The boarding gate at Haneda Airport looked like a “difficulty level switch” for my life.

The project had only started one month earlier.

Then suddenly, my manager said:

“You’re going to London for two weeks.”

What?

It wasn’t training.
It wasn’t an inspection visit.
It was a real overseas business trip.

And the destination was London.
The financial district of Waterloo.

At the time, I was in my eighth year as a working professional.
I had always admired global projects.

But honestly speaking, I barely understood how financial systems actually worked.

Of course, I studied hard.
Markets, settlements, trading systems, financial networks…

But it was difficult.

Even after reading books and attending meetings, I still felt like I only “kind of understood” things.

And in the middle of that uncertainty, the London trip was suddenly decided.

The purpose was simple:

“To understand the financial system running in London.”

Honestly… wasn’t that impossible?

The Reality of Big Corporate Projects

Looking back now, I realize that being involved in projects of this scale is one of the strengths of large companies.

This was a system influential enough to impact the Japanese financial market.

And we were actually being sent to the real site.

That kind of opportunity is rare.

That’s why I told myself:

“I have to prove myself here.”

At the time, I was still nobody special.
But maybe, if I could deliver results here, I could change myself.

My motivation was through the roof.

Heading to London’s Financial District, Waterloo

The team consisted of five members.

• Server team members
• Operations specialists
• Me, representing the application side
• And the project department manager

Notably, no salespeople joined the trip.

This wasn’t a trip to “sell” anything.

It was purely about understanding the system itself.

That team composition created an unusual level of tension.

Especially the system department manager.

Quiet.
Calm.
But carrying overwhelming authority.

He never spoke unnecessarily.
But when he answered questions, he only spoke about the essence.

At the time, even his presence alone made me nervous.

Was Two Weeks Long? Or Too Short?

Back then, hearing “a two-week overseas business trip” sounded incredibly long.

It was my first overnight business trip.
And it was overseas.

That alone felt extraordinary.

But now I understand something different.

Two weeks is far too short to truly understand a massive financial system.

Server architecture.
Operational design.
Monitoring systems.
Databases.
Networks.
Market connectivity.

Every time I understood one thing, another unknown appeared.

In other words, global financial systems were gigantic structures.

And understanding those structures required more than just technical skills.

The Ability to Move Forward Without Full Understanding

During that experience, I learned an important reality.

The truly capable people do not wait until they fully understand everything before taking action.

Instead, they can:

• Move forward despite uncertainty
• Build hypotheses
• Communicate continuously
• Organize complex structures
• And keep progressing

This ability was especially critical in global projects.

Because we were expected to understand financial systems—already difficult even in Japanese—within an English-speaking environment.

In other words, “not fully understanding” was the default condition.

The real challenge was how to move forward anyway.

And honestly, that is where true engineering capability reveals itself.

Do Japanese Companies Lack “Experience Before Confidence”?

Here’s something that may spark debate.

Japanese companies may rely too heavily on a culture of “understand first, then challenge.”

Of course, quality matters.
Reducing failure matters too.

But in global projects, you also need experience jumping into uncertainty before full understanding exists.

In reality, during that London trip, I never completely understood everything.

In fact, I was surrounded by things I didn’t understand.

But that experience changed me profoundly.

Jumping into unknown worlds.
Facing systems I couldn’t fully understand.
Still continuing to move forward.

I believe that was my true first step toward working globally.

Even now, I still remember the tension I felt while walking through Waterloo’s financial district.

I can do it! Tomorrow, I take the next step forward.