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Asia-Pacific · Window Manufacturer

Fujisash

🇯🇵 Japan · Last reviewed by Justin Orloff

Fujisash window product

Fujisash window systems

Quick Facts

founded

1930 (aluminium sash from 1958)

hq

Japan

primaryMaterials

Powder-coated and anodised aluminium profiles

glazingPartner

AGC, NSG and others specified per project

marketTier

Premium Commercial and High-End Residential

Brand at a Glance

  • Country: Japan
  • Founded: 1930
  • First aluminium sash: 1958
  • Notable project: Kasumigaseki Building curtain wall (Japan's first skyscraper, 1968)
  • Primary materials: Powder-coated and anodised aluminium
  • Market: Premium commercial and high-end residential, Japan

Product Range

  • Commercial curtain wall
  • Residential aluminium sash
  • Store front systems

Why This System

Fujisash's heritage in landmark commercial projects means their curtain wall systems are encountered on significant, high-value buildings. The glass in older Fujisash curtain wall installations may be single-glazed - a specification no longer used in new construction but still present in 1960s and 1970s building stock. Anodised aluminium finishes appear more frequently on Fujisash commercial systems than on mass-market TOSTEM residential products. Anodising requires a different cleaning approach from powder coat - it is more resistant to UV degradation but more susceptible to alkaline cleaning agents. The age of some Fujisash installations means the original sealants and glazing compounds may be at or beyond their service life. Cleaning pressure or cleaning chemistry that would be routine on a modern installation can accelerate seal failure on 40-year-old glazing.

Step 1 of 2: Manufacturer Recommendations

Official Care Guidance

No official guide published. The steps below are based on Justin Orloff's 25 years hands-on experience with this system.

Step 2 of 2: The Orloffs Protocol

The Orloffs Protocol

This is how I clean Fujisash windows. The tools and technique below come from 25 years of daily professional work on the glass. Every step has been tested on real installations and adapted specifically for Fujisash systems.

Pro Tools

My daily tool list. This is what I carry to every job.

1Professional squeegee 45 cm or 55 cm
2Extension pole - carbon fibre
3Unger HiFlo pure water fed pole
Watch the Window Cleaning Manifesto hereSee these techniques in action. Free, 5 minutes, lifetime access.

Pro Tips

  • On anodised Fujisash frames, test your cleaning product on an inconspicuous corner first - even products labelled pH-neutral can vary between batches and pH-meter verification is the only certainty
  • Older Fujisash curtain wall on landmark buildings may be subject to heritage or conservation constraints - check with the building manager whether any specialist glazing contractors are involved before starting

What NOT To Do

  • Do not use alkaline cleaners on anodised aluminium - they dissolve the anodic layer
  • Do not use acidic cleaners on anodised aluminium - they react with base metal at scratches
  • Do not use abrasive pads on anodised or powder-coated frames
  • Do not pressure wash into gaskets or sealants on pre-1990 curtain wall installations
  • Do not squeegee with heavy edge pressure on old glazing - seal failure risk on aged sealants

Bundle Kits and Tool Recommendations

Bundle Kit

Orloffs Squeegee Pro Pack flat lay
Pro KitThe full professional setup. Brass squeegees, T-bar with applicator cover, tool belt, rags, soap, and bucket. Everything from the daily tool list in one box.Shop now →
Orloffs Squeegee Pro Pack bundled

Tool Recommendations

pH-neutral glass cleaning concentrate (safe on anodised aluminium)

View on Amazon [coming soon]

Microfibre T-bar applicator

View on Amazon [coming soon]

Professional squeegee with fresh rubber

View on Amazon [coming soon]

Cleaning Frequency

Clean every 4–8 weeks depending on environment.

Frequently Asked Questions

How often should I clean Fujisash windows?
For Fujisash windows, we recommend cleaning twice a year depending on your local environment. Coastal or urban locations may need more frequent cleaning.
What tools do I need for Fujisash windows?
Professional cleaning of Fujisash windows requires my daily tool list of: Professional squeegee 45 cm or 55 cm, Extension pole - carbon fibre, Unger HiFlo pure water fed pole.
What should I avoid on Fujisash windows?
Do not use alkaline cleaners on anodised aluminium - they dissolve the anodic layer
Does Fujisash publish an official cleaning guide?
Fujisash has not published an official cleaning guide. The protocol on this page is based on Justin Orloff's 25 years hands-on experience.
Can I use a water-fed pole on Fujisash windows?
Yes, purified water via a water-fed pole is one of the safest methods for Fujisash glass. Ensure TDS is at or near zero before use and avoid directing high-pressure water at seals or gaskets.

Field Notes

“Kasumigaseki Building and other 1960s Fujisash curtain wall installations are now over 50 years old. Any cleaning on these buildings should be briefed to the building manager - sealant and gasket condition should be assessed before the first clean on aged stock. Anodised aluminium on older Fujisash commercial systems can show white bloom - oxidation deposits in surface pores. These are removable with a dedicated anodised aluminium cleaner, not with standard glass cleaning products.”

Justin Orloff

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