NextCent Inc.

Web System / SEO / Project Management

Create a future. NextCent Inc.

A Tokyo-based partner for web systems, SEO, and project management.

Web System Development, SEO/AIO, and DX Project Management

Contact us See our services
  • Available in English and Japanese

Sound familiar?

  • 01

    You want to renew your existing system

  • 02

    You want to launch a new web-based business alongside your core business

  • 03

    You want to strengthen the security of your systems

  • 04

    You want to automate phone-based work with AI

When development, marketing, or project management stalls, the whole business stalls. NextCent takes on all three.

About us

We don't stop at launch.
We work backward from business results.

We treat planning, development, marketing, and operations as one — and stay with you until you see results.

Three reasons clients choose NextCent

  1. Point 01

    Designed by people who have run a business

    We planned and ran our own portal site with about 2,700 partner stores, all the way through to its sale. We understand business models and revenue structures, and decide which features truly matter — and in what order.

  2. Point 02

    Marketing built in from day one

    We design site structure with SEO and advertising in mind. Instead of thinking about traffic after launch, we aim for a site that search engines and users understand from the day it goes live.

  3. Point 03

    Cross-border projects, led in English

    Drawing on experience running local entities in Singapore and Malaysia and managing system development for overseas companies, we handle requirements, documentation, and presentations in English.

Active users
5,000
Net users of the systems we currently maintain
Countries
5
Countries with active projects (Japan, Hong Kong, Malaysia,Canada,USA)
Since
2008
The year our founder started their first company

What we do

Our three services — project management, development, and marketing — can be engaged individually or in combination.

Service 01

Project Management

On the client's side, all the way to delivery.

“We don't know where to start.” “We're not on the same page as our vendor.” “We want to build with an overseas team.” When system development goes wrong, the cause is often not the technology, but how goals are shared and how the project is run. NextCent works on the client's side — understanding both technology and business — and drives the project through to delivery. We have managed system development projects for overseas companies in English, not just for clients in Japan.

  • PMO
  • Requirements
  • RFP
  • English PM
  • Global Team
Problem definition & planning
Clarifying business challenges, defining business models, and building roadmaps
Requirements & RFP
Preparing documents for outsourcing development, and supporting vendor selection
Project management (PMO)
Managing schedule, quality, cost, and risk, and coordinating stakeholders
Vendor liaison
Communicating each side's intentions from a position that understands both technology and business
English-language PM for overseas companies
Managing overseas companies' system development end to end in English: requirements, specifications and documentation, meeting facilitation, progress reporting, and delivery

Global Project Management

System development project management in English

We have managed system development in English for clients based overseas. With communication designed around differences in time zones, culture, and business customs, we lead cross-border projects through to delivery.

  • Requirements interviews, specifications, and proposals in English
  • Running meetings and presentations in English
  • Bridging overseas clients and development teams in Japan and abroad
  • Knowledge transfer to clients' in-house engineers, including fix instructions and samples

Recommended for

  • Companies without dedicated IT staff
  • Companies launching a new web service
  • Companies considering a system renewal
  • Companies struggling to work with external vendors
  • Overseas companies that want to discuss Japan-related system development in English

Our track record

  • Large-scale project experience in government systems and as an ERP implementation consultant
  • Establishing and running local entities in Singapore and Malaysia
  • Planning and running our own portal site with about 2,700 partner stores

Service 02

Web System Development

The right features, in the right order.

More features don't always mean better results. We clarify the problem and narrow down the technology and features to match your goals, so you can launch faster without unnecessary cost. From business systems and membership services to subscription billing and Shopify add-ons, we cover everything from requirements to development, maintenance, and operations.

  • PHP
  • Laravel
  • MySQL
  • AWS
  • Shopify API
  • Polaris
  • Auth0
Requirements & technology selection
We listen to your challenges and propose the right architecture and system for your goals
Web application development
Membership sites, booking systems, subscription billing, admin dashboards, and more
E-commerce & integrations
Shopify apps and add-ons, identity integration such as Auth0, and API integrations
MVP development
Launch quickly with the minimum features needed to validate a new business
Infrastructure, maintenance & operations
Server setup centered on AWS, plus post-launch maintenance and new features

Recommended for

  • Launching a new web service quickly and lean
  • Systematizing operations such as membership management and payments
  • Adding custom features to Shopify
  • Improving an existing system while keeping it running

Service 03

Web Marketing (SEO)

A site search engines truly understand.

We are a “Search Engine Communicator,” bridging search keywords and search engines. Rather than chasing short-term ranking tricks, we revisit crawlability and site structure from the ground up to build sites that both users and search engines understand correctly. We also handle SEO for large portal sites and multilingual sites.

  • Technical SEO
  • Structured Data
  • Multilingual SEO
  • Facebook Ads
SEO consulting
Analysis and improvement proposals, focusing on large-scale sites such as portals
Technical SEO
Crawlability improvements, site structure and internal linking, and structured data (semantic web)
SEO-aware site & system design
Building search engine considerations into the design from the development stage
Multilingual SEO
SEO design for international sites in English, Thai, and other languages, with documentation and presentations in English
Web advertising
Facebook / Instagram ad campaign design and operation, with measurement and optimization using Pixel

Recommended for

  • Sites whose search traffic has plateaued after launch
  • Portals and other large sites with many pages
  • Strengthening SEO for English, Thai, or other international sites
  • Planning customer acquisition that combines SEO and advertising

Our SEO policy

  • We use only white-hat methods — never black-hat SEO
  • Centered on crawlability, we make the entire site semantic
  • We apply this approach not only to consulting, but as the foundation of our system development

How we work

From first contact to post-launch support, in six steps.

  1. 01

    Contact

    Reach out via the form or by phone. We respond in English or Japanese.

  2. 02

    Hearing

    We learn about your current challenges, goals, budget, and timeline.

  3. 03

    Proposal

    We present a concrete plan, team, and cost tailored to your needs.

  4. 04

    Kick-off

    Once the contract is signed, we start with requirements definition.

  5. 05

    Execution

    We report progress regularly and adjust the plan as needed.

  6. 06

    Support

    After launch, we keep improving and maintaining the system until it delivers results.

Selected work

We've supported projects across industries and scales, combining development, SEO, and marketing.

01SEO / Global

SEO design for a Thai / English real estate portal

  • SEO
  • Development
  • Marketing

Highlights

  • Proposed a redesign of the crawling structure for a large Thai-language real estate portal (rentals and sales), with search engines in mind.
  • As the client team was entirely non-Japanese, we prepared all documentation and delivered presentations in English through to delivery.
  • Because the client's in-house engineers handled the final fixes, we provided concrete fix instructions and samples, and completed delivery successfully.
Scope & tech stack

Scope

Problem definition from an SEO perspective / proposing concrete solutions

Development

AWS, PHP Laravel, MySQL

Marketing

Facebook campaign design / Facebook operation / Facebook ads (using Pixel)
  • AWS
  • PHP
  • Laravel
  • MySQL
02Development

Launch of a social studies learning platform for elementary and junior high school students

Duration: 4 months

  • Development
  • Marketing

Highlights

  • The target users needed to flow into the next project, with each service driving traffic to the other.
  • We introduced Auth0 for cross-service identity and built a minimal system to validate the MVP efficiently and accurately.
Scope & tech stack

Development

System selection / specifications / development (PHP Laravel, MySQL, Auth0)

Marketing

  • Facebook campaign design
  • Facebook operation: reaching early adopters and acquiring users to validate the MVP (Minimum Viable Product)
  • Facebook ads: using Facebook Pixel to reach MVP test users and drive sign-ups
  • PHP
  • Laravel
  • MySQL
  • Auth0
03Development

Certificate issuance add-on for products purchased on Shopify

Duration: August–September 2020

  • Development
  • Marketing

Highlights

  • Little information on Shopify add-on specifications was available in Japanese, so we researched the specifications through forums and Q&A sites.
  • Designing to Shopify's detailed design guidelines was unlike any shopping cart system we had worked with before, and a valuable learning experience.
Scope & tech stack

Scope

Problem definition / Shopify specification research / roadmap / development

Development

Shopify Partner account application and registration / system selection / specifications / development (PHP Laravel, Shopify API, Polaris)

Marketing

Facebook campaign design / Facebook operation (reaching early adopters and acquiring MVP test users)
  • PHP
  • Laravel
  • Shopify API
  • Polaris
04Development

Building and operating an event booking site

  • Development
  • Marketing
  • Operations

Highlights

  • Designed a user flow that builds on how members already move through the existing system.
  • Designed the system to handle a membership base of 10,000 users, and implemented an admin dashboard that analyzes churn, traffic sources, and more from multiple angles.
Scope & tech stack

Scope

Business model / system planning / development / operations

Development

AWS, PHP Laravel, MySQL

Marketing

Facebook campaign design / Facebook operation / Facebook ads (using Pixel)
  • AWS
  • PHP
  • Laravel
  • MySQL
05Data / Analytics

User-behavior cluster analysis tool built on BigQuery and Databricks

Duration: 6 months

  • Development
  • Data analysis
  • Operations

Highlights

  • Consolidated Nginx server logs from the client's service into BigQuery, and built a platform to analyze large volumes of access data with Databricks and Python.
  • Classified user access through cluster analysis and visualized behavior patterns.
  • By analyzing multiple accesses together as clusters, we made it possible to analyze a specialized environment that had been a challenge for the client.
  • Handled everything from development to operations.
Scope & tech stack

Scope

Problem definition / analysis design / data platform / development / operations

Development

BigQuery, Databricks, Python, Nginx (server logs)
  • BigQuery
  • Databricks
  • Python
  • Nginx
06PM / Global

Industry-specific customization of an AI voice agent system for outbound and inbound calls

  • Project Management
  • Requirements
  • Testing

Highlights

  • Customized an existing AI agent system for outbound and inbound calls to fit the industry of the contracted client.
  • Led hands-on technical project management, centered on requirements definition and functional specification changes.
  • Coordinated specifications with the overseas software vendor in Japanese and English.
Scope & tech stack

Scope

  • Requirements definition on the Japanese side, and consolidation of change requirements
  • Communicating and coordinating functional specification changes with the software vendor
  • Schedule management and test verification for each change
  • Aligning specifications among stakeholders in Japanese and English

Role

Technical PM / Requirements definition / Change requirements / Overseas vendor coordination / Schedule management / Test verification

Tech stack

Twilio, ElevenLabs
  • Twilio
  • ElevenLabs

Frequently asked questions

Can I request just one of project management, development, or SEO?

Yes. Each service can be engaged on its own, and we can also propose combinations — for example, development plus SEO.

We already have a development vendor. Can you handle project management only?

Yes. We work on your side, liaising with the vendor and managing the project.

Do you work in English with overseas companies?

Yes. From the first conversation through requirements, documentation, meetings, and delivery, we work in English.

Can I reach out even if I'm not sure what to ask for?

Of course. Even if your challenges aren't clearly defined yet, we'll sort out goals and next steps together.

Do you provide maintenance and improvements after launch?

Yes. We continue after launch with maintenance, new features, and SEO improvements.

How can I contact you?

Through the contact form at the bottom of this page, or by phone (+81-50-3161-9784).

Company profile

Company name
NextCent Inc. (株式会社ネクストセント)
Representative Director
Hiroyuki Karimata
Founded
2020
Address
6F, 2-2-5 Kichijoji Minamicho, Musashino-shi, Tokyo 180-0003, Japan
Phone
+81-50-3161-9784
Business
Project management (Japan and international) / Web system development / Web marketing (SEO)
Languages
Japanese, English

Founder's background

  1. Born in 1982

  2. Joined a systems integration company, working on government systems

  3. Joined Tekutora Japan Co., Ltd. as an ERP (enterprise resource planning) implementation consultant

  4. 2008

    Founded TeraDox Inc. in Tokyo

  5. 2013

    Established Japase Pte. Ltd. in Singapore and Malaysia

  6. 2015

    Introduced an online photo sales system to kindergartens and primary and secondary schools in Singapore and Malaysia, reaching 5,000 users annually

  7. 2018

    My Furisode Dotcom, a portal site for furisode (formal kimono worn at Coming-of-Age ceremonies) run by TeraDox, reached 2,700 partner stores

  8. 2019

    Sold TeraDox to Hakuba Shashin Sangyo Co., Ltd., Japan's largest maker of photo and camera accessories

  9. 2020

    Founded NextCent Inc.

  10. 2025

    Patent pending: “Activity Evaluation System, Activity Evaluation Method, and Activity Evaluation Program” (Japanese Unexamined Patent Application Publication No. 2025-415, JP 2025-415 A)

Get in touch

Tell us about your challenge.

“We don't know where to start.” “We want more search traffic.” “We want to build with an overseas team.” It's fine if things aren't clear yet. We welcome inquiries about project management, development, and SEO — in English or Japanese.

Tel

+81-50-3161-9784

Form