Okamura SHIBUSA User manual

G1C791／2020-09
Office Seating
Instructions for Use

1 2
Safety Instructions (Make sure to follow these instructions)
Caution
Do not handle roughly, or use improperly. Failure to follow the safety
precautions cause injury or damage to the product.may
Caution
Installation
●Many chemical substances will be released by the product when it is first purchased. Sufficiently
ventilate or expose the product to moving air for some time after purchasing it.
●Do not completely close windows when using the product in rooms with conspicuously high
temperatures/ humidity (the benchmarks for these are temperatures in excess of 28°C (82.4°F) and
relative humidity in excess of 50%).
Appropriate Ventilation Measures
Top surface of the
support base at the
back of the seat
●Nylon wheels may slide too well to cause the chair
to fall. Use urethane wheels. The nylon wheels are
suited for floors covered with rugs or carpets.
●Do not leave any abnormalities as is
during use. Failure may cause the main
unit to be broken and cause injury.
●If found unstable due to loosening of bolts or
screws, retighten them.
●Do not use if any parts come off.
●Do not use this stool as a
step stool or load carrier.
●Do not stand on the chair
or sit on the front edge
portion of the seat.
●Do not sit on other than
the seat.
●In particular, be careful not to have your
hands or fingers caught in the gaps of the
upper portion of the support base at the back
of the seat.
Do not reconfigure. This leads to
malfunction or accident.
●Reconfiguring by yourself causes the product
to malfunction or accident. Okamura will
have no responsibility for any disadvantages
caused by remodeling.
●If you need remodeling, contact our official
dealers beforehand.
Be careful of the following items since it
may cause injury or damage the product.
For P tile floor
Do not disassemble or repair on your own.
●The part indicated by the
arrow mark is filled with high
pressure gas. If you find any
abnormalities, contact our
dealer or Customer Service
without disassembling or
repairing by yourself, which is
very dangerous.
●If found any loose bolts or screws, do not use
the product. Failure may cause damage to the
product and result in injury.
Do not put your fingers or hands into the spaces or
moving parts of the product. This may lead to injuries.
Hard casteｒSoft caster
●Since leather is a natural material, there may
be slight differences in texture including
creases, unevenness, and gullies depending
on the portion. In addition, scratches may be
viewed on the surface; scars of injury that the
animal concerned got in the natural world.
Those prove that the animal was alive and
are great differences from artificially made
synthetic leather. Therefore, they will never
ruin the functions or quality of the material.
● The surface of this leather is treated with a high technology to be water-resistant and stain-resistant
without ruining the leather-specific features. The soft and supple touch of the leather will fit you over time.
●Clothes or leather may rub against the leather of the chair to generate sound depending on the leather
covering method and design. This is specific to leather.
Characteristics of leather upholstery
Wrinkle/gully (creases from
the neck to the chest made
to move the neck)
Scratch (scar)
Natural wood varies in graining and color due to a natural material. The surface of the material is treated
for durability improvement and protection as furniture, providing soft and calm texture of the natural
material. The surface treatment may cause slight differences in color due to originality of the material,
which is also a characteristic of the natural material. Further, the color will be deepened to generate grace
and dignity over time. Some products may generate wood-specific smell or may get moldy if left in humid
places. It is recommended to practice regular ventilation. Please understand those characteristics and
carefully read this manual for your long and continued use.
＊ Natural wood includes solid wood, veneer, artificial veneer, plywood, molded plywood, laminated wood,
MDF (Medium Density Fiberboard), etc.
Characteristics of natural wood
Do not place on uneven floor.
Indoor use only. Avoid direct sunlight
●No outdoor or waterfront use.
Avoid high temperature, high humidity,
or extraordinary aridity.
●When placing alongside windows, use curtains
or blinds to avoid direct sunlight.
●Make sure to place the product on an even
floor when using. Failure may cause the
product to deform or to be damaged.
Do not place product under heater
or airconditioner exhausting high
temperature air.
Please follow instructions below. Failure may cause serious damage to the product and
Okamura will have no responsibility for any damages.
Do not handle roughly, or use improperly.
Failure to follow the safety precautions
cause injury or damage to the product.may

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Operation Guide
Troubleshooting
Problem
Check Solution Page
The seat cannot
be lifted up.
Are you sitting on the seat when
adjusting the seat height? Adjust the seat height while not
seated on the seat. 3
Is the seat height in its highest
position? The seat cannot be lifted up beyond
the highest position. 3
The seat cannot
be lowered.
Are you sitting on the front edge of
the seat?
Sit in the center of the seat while
adjusting.
3
Is the seat height in the lowest
position? The seat cannot be lowered beyond
the lowest position. 3
Casters do not
move smoothly. Are they tangled with lint or wool? Remove lint or wool or replace the
casters.
＊
Casters are
slippery.
Are you using urethane casters on hard
floors such as a plastic tile floor?
Use soft casters.
Chair makes
noise. Visit a retail shop or the nearest
branch.
＊：Please contact an official dealer.
Parts Name
Backrest
Armrest
Seat
Leg
Caster
Gas lift
Support base
Back
Panel
Seat height
adjustment lever
■Back rocking
When you lean on the backrest, the back of
the seat will incline backward. The rocking
angle of the back is 11 degrees.
11°
Seat top/bottom
Seat height
adjustment lever
■Seat height adjustment
Adjust the seat height using the seat height
adjustment lever on the bottom right of the
seat. The seat will be lowered if you pull the
lever while seated, and it will stop at any
position you release the lever at. The seat will
be raised if you pull the lever while not seated
on the seat.

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● Regular maintenance is recommended for long-life use.
Make your request to us early for inspections and repairs
(fees required) when the warranty period has expired.
●Parts replacement
For parts replacement and after-sales service,
contact our dealer.
●If the product has become unsteady due to
loosening of the bolts or screws during use,
retighten them immediately.
●
Avoid direct exposure to steam. Failure will cause rust.
●This instruction manual is very important, so
store it in an easily accessible location.
Operating Precautions and Maintenance
For daily care
●Wipe off with a dry soft clean cloth.
● Immediately wipe off any water or fingerprints (sebum).
Please note that the aluminum portion will get oxidized
to lose its gloss and deteriorate the texture if the chair
is left with water or fingerprints (sebum) attached.
● If dirt is noticeable, wipe it off with a well wrung
soft cloth moistened with thin neutral detergent.
Be sure to remove detergent completely with a
damp cloth and wipe again with a dry cloth to
dry it.
Aluminum part Resin part
●Wipe off with a dry soft clean cloth.
●Immediately wipe off any liquid with a dry cloth.
If dirt cannot be removed, wipe using a cloth
moistened with slightly warm water.
〈Caution〉
●Do not use an organic solvent such as thinner
and benzene, alcohol, a chemical cloth or a shoe
cleaner. Please note that the chair with its color
or texture deteriorated cannot be restored to its
original state.
Leather part
Materials and Surface Finish
Part Main Materials Surface Finish
Structural
parts
Backrest
Frame Metal (Steel）Polyester coating
Core material Polypropylene
−
Back Panel
Veneer applied
Curved plywood
Urethane Resin Coating
Seat Inner shell Curved plywood
Support
base
Polished type Metal (aluminum） −
Coating type Metal (aluminum）Polyester coating
Leg Polished type Metal (aluminum）
−
Coating type Metal (aluminum）Polyester coating
Armrest Body
Polished type Metal (aluminum） −
Coating type Metal (aluminum）Polyester coating
Pad
Common for all models Polyurethane −
Covering
material
Cloth Herringbone Acrylic, Wool
−
Inter lock Polyester, Cotton −
Leather bull leather −
Cushion
material
Backrest Polyurethane foam
−
Seat Polyurethane foam −
＊Please understand that product specifications might change without prior notification due to improvements
made to the product.
Please follow instructions below. Failure may cause serious damage to the product and
Okamura will have no responsibility for any damages.
Instructions to Extend the Life of Product
Cloth part
●Remove dust using a vacuum cleaner while
brushing with a soft brush or tapping on the
surface not to damage the cloth of the chair.
●When it gets dirty after extended period f time,
wipe with a well wrung soft cloth moistened with
thin neutral detergent. Wipe clean with a damp
cloth. Be sure to wipe detergent completely and
wipe again with a dry cloth to dry it.
● When using alkaline electrolyzed water to remove
stains, spray directly on the stain and brush with
a soft brush taking care not to damage the cloth.
Then, wipe the moisture and stain to remove and
wait for the cloth to dry.
● When it gets an oily stain, dab and remove it by
using a dedicated stain remover immediately.
Then wipe with a soft cloth dampened with water,
followed by a dry cloth to dry. Stains may be
permanent depending on the material
〈Caution〉
●Remove stains as quickly as possible.
●
Avoid causing a circular stain, remove not only the
stain but also wipe off thoroughly around the stain.
● Try the cleaner on inconspicuous area first since
the surface may discolor or deteriorate by using it.
●Gently wipe with a clean, dry, and soft cloth in
the direction of the grain.
●When it gets exceptionally dirty, wipe off the
dirt with a well wrung soft cloth moistened, and
wipe again with a dry cloth to dry it.
〈Caution〉
●
Do not use the following items which will damage the
coating.
◎Thinner, benzene, alcohol, lacquer, oil, vinegar, boiling
water, polishing powder, etc.
●Do not frequently wipe with a cloth moistened,
otherwise, the wood portion will be cracked.
Wood part