Job Description
Custom Media is an award-winning integrated marketing agency based in central Tokyo. We are seeking a reliable, detail-oriented, and proactive Finance & Office Assistant to support our financial operations and office administration.
This is a hybrid role suited to someone who enjoys variety, takes ownership of their work, and can manage both numbers and day-to-day office coordination with confidence.
This position supports both finance operations and office/administrative functions. The role is hybrid, requiring at least two days based in our Kamiyacho office.
The ideal candidate will be a native Japanese speaker with a good command of English and over three years of office administrative experience.
Experience (junior, mid-level, etc.): Mid-level
Location: Tokyo (hybrid, 2 days in office)
Candidates can apply from: Japan Only
Visa sponsorship support: Not available
Monthly salary: JPY 350,000 - 420,000 per month
Responsibilities
FINANCE & ACCOUNTING SUPPORT
Manage Accounts Payable and Accounts Receivable, including:
- Processing vendor invoices and payments in coordination with our
outsourced accounting partner - Issuing and processing client invoices
- Assist with bank and account reconciliations
- Handle staff expense claims and manage petty cash reporting
- Provide general administrative support to the finance function, including filing, documentation, and responding to internal inquiries
- Support day-to-day financial operations as needed
OFFICE ADMINISTRATION & HR SUPPORT
- Manage incoming and outgoing communications, including phone calls and postal mail
- Maintain office supplies inventory and coordinate ordering
- Support HR-related administration, including:
- Coordinating onboarding processes for new hires
- Liaising with the outsourced accounting firm on HR documentation (health insurance, pension, etc.)
- Assisting foreign employees with visa-related document preparation
- Run office-related errands when required (e.g., bank, tax office, law office)
Qualifications
EXPERIENCE & EDUCATION
- Bachelor’s degree
- 3+ years of relevant experience in finance administration, office administration, or a similar role
- Experience working in a multicultural environment is highly valued
SKILLS & COMPETENCE
- Language: Native Japanese fluency is essential, with a good command of English
- Organization & Accuracy: Strong attention to detail, excellent numeracy, and the ability to prioritize and manage multiple tasks
- Technical Skills:
- Proficiency in Microsoft Office and Google Workspace
- Strong Excel skills (VLOOKUPs and Pivot Tables are a plus)
- Experience using accounting software
- Work Style:
- Proactive, flexible, and quality-oriented
- Able to work independently while collaborating effectively with the team
- Positive and constructive under pressure
TEAM FIT
- A collaborative team player who is open to feedback and willing to share ideas
- Professional, dependable, and service-minded
LANGUAGE REQUIREMENTS
- Japanese: Fluent
- English: Business level
WHAT THE CANDIDATE NEEDS TO PROVIDE
- Resume and cover letter
About the Company
RECENT NEWS
We are thrilled to announce that AIM B2B by Custom Media has taken top honors at the 2025 Campaign Asia Agency of the Year Awards. This victory marks the culmination of an incredible season of recognition, completing a Triple Crown of wins alongside our recent successes at the BBN Golden Bees and the Ireland Japan Chamber of Commerce (IJCC) Business Awards.
When we officially launched AIM B2B in July, we set out with a singular mission: to redefine B2B marketing in Japan by bridging the gap between global strategy and local execution. The recent recognition from Campaign Asia—the region’s most prestigious industry benchmark—confirms that our vision isn’t just resonating, it’s leading the market.
See more at: https://aim-b2b.com/blog/winning-on-all-fronts-a-season-of-recognition-for-aim-b2b/
MEET OUR TEAM
Global. Diverse. Creative.
https://custom-media.com/about/team/
BENEFITS
- 9:30am to 6:30pm, Monday to Friday
- Work from home and / or office flexibility
- Holidays: Saturdays and Sundays, National Holidays and Paid Vacation
WHY JOIN US?
- Be part of a dynamic, collaborative multicultural team
- Enjoy a flexible, hybrid/remote work environment.
- Opportunities for professional growth and continuous learning.
- Attractive salary negotiable based on experience.
- Transport allowance, work from home allowance.
- Paid vacations, social insurance and benefits.
- The company will provide laptop with required software.
- Friendly, comfortable environment at a central office in Kamiyacho.