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Front page.

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Imprint page.

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CommissionedOfficersGuntoManufacturingSpecifications.(EnglishTranslation)EnglishTranslationbyGeorgeTrotter,DocumentsprovidedbyK.Morita

Article1.Thedrawingsandwritingsappendedatleftdescribethespecificationsforthemanufactureand

polishing

of

each

blade

to

be

delivered/supplied.

1. Generallytheshapeandlengthwillbeabalanceofeleganceandstrength.Cuttingabilitywillbegoodandespeciallyasregardstheforgingofthehirauchiandthemuneuchi,thesewillbe

toughbutlight,soasnottobendorbreak.

2. Shapewillbeshinogitsukuriandtoriizori.3. Bladeswillbeoftamahaganeandhochotetsuandcharcoalwillbeused. Thestrongest

methodsofswordforging,combiningtoughnessandstructurewillbeenforcedon

commencement(asdescribedintheenclosureforstyleinForm4).Hakocarboncontentwill

be0.50.7%range.Hochotetsucarbon carburizingwillbecontrolledbymultifoldforging.

Carboncontrolwillbeinthe0.050.25%range.

4. Hamonisoptionalbutmustbechuinwidth.5. Nakagoshapeandfileworkwillbeofqualityandmeicuttingwillbescrupulouslydone.Themei

willbeontheoutsideinthenormalwayandonthereverse/oppositesidewillbethedateof

manufactureasyear,month,day(sexagenarycycleisalsopermissible).

6. Thebladebodywillhaveadegreeofniku,butmuneandshinogijisurfaceswillbeflat.Jiandharoundnesstobemoderatelyhamaguriba.Therewillbenounevennessinthepolishingofthe

cornerlines,curvesorstraightlines,norinthesymmetryoftheomoteandura.Therewillbe

nogrindingmarksandscratches.Jihadawillbeclearlyapparent.Yakibaborderlinetobe

wipedwithnugui.Theshinogijiandmunejitobepolishedusingmigakibo(burnishingneedle)

totheareaofthehabaki.Thekoshinogiandthematsubakadointerceptionpointkasanewill

alsobepolishedleavingitalittlethick,thedimensionsofthehasectionandthemunesection

tobeattheregulationdimensionsandnotless.

7. Curvature,width,thickness,tiplengthandotherdimensionsaretobeconsistentwiththeexplanatorydiagrams.

8. Lengthandweight.Hawatari. Small:2.0 2.1shaku(60.6 63.6cm).195 205momme(731.3 768.8g).

Medium: 2.1 2.2shaku(63.6 66.7cm).205 215momme(768.8 806.3g).

Long: 2.2 2.3shaku(66.7 69.7cm). 215 225momme(806.3 843.8g).

Nakago. 7sun(c.21.2cm).

9. Long,mediumandshortmanufactureistobecarefullyadvised.10.Concerningtheshapeanddimensionsofcompletedswords,alittlevariationtotheappended

drawingsis

acceptable,

but

exceeding

the

weight

must

be

with

approval.

11.Itisarequirementthatmanufacturerwhodoesyakiireisthesamemanwhodoesthemeicutting.

12.Smallchanges,variationsoroverlapsintheforgingmethodorhardeningcomponent,requiresgovernmentapproval.

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Article2.Wherethereisanydoubtaboutmanufacture,themanufacturerwillreceivetheappropriateswordworkshopdirection.

Article3.Drawings,instructionsandmaterialswillbesuppliedforthepurposeofcorrectmanufacturing

process.

Where

the

delivery

of

materials

for

use

in

manufacturing

is

partly

insufficient,thedeficiencywillbemadeupwithoutcharge,providedthecauseisduetoinferior

material.Conversely,whereasurplusofmaterialsoccurs(unusedmaterialandunfinisheditems)or

itemsfailinginspection,itisrequiredtobereturnedtothegovernment.

Article4.Inspectionisconductedaccordingtotheinformationappendedatleft.1. Complianceexaminationswillbeconductedwithaqualitytest,asharpnesstest,anexternal

appearanceinspectionandaqualityofmaterialsinspection.Thefirsttestwillbeforcutting

ability(chunagura).Atthattimeasecondtestfortheappearance(byanexperiencedpolisher)

willbeconducted.Inconformitywithgovernmentexaminationforqualitytestingandmaterials

inspection,

eligible

swords

will

be

selected

at

their

discretion

from

those

submitted

to

conduct

sharpnesstestsandexternalappearanceinspections.

2. Forcompliancetestingitisrequiredthatasectionofsteeltube(dia.80mm)tostrikefrom 60degrees acrossthebladeflattoascertainitsbendorbreakquality.Ontheoccasionoffailing

thetestthemanufacturerconcernedwillreceiveinstructionsfromthegovernmentbefore

furtherinspectionsthatthereafterhemustcomplywiththerules.

3. Concerningtheitemsubmittedforqualityofmaterialtestinginthepreviousparagraph,amicroscopiccrosssectioninspectionwillbeconducted.

4. Cuttingtestwillconsistofrolledupstraw(2mmthick,10cmdiameter)aswellasasoftsteelplate(2mmthick,1cmwide).Theformerwillbecutsatisfactorilyandthecutwillbeatleast

12cm.Inthelatter,itisrequiredthatthehadoesnotsustaindamagenorthebladebend.

5. Externalappearanceinspection.1. Generally,externalappearancerequiresakeepingtotheregulationsonbalance,shapeand

weight.

2. Itisrequiredthatinthebladethathagire,jiganekizu,yakiwareandsuchlikeflawsarenotpresent.

3. Thestandardofpolishistoappearascloseaspossibletothesamplespecimen.