http://en.wikipedia.org/wiki/Katana
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Ownership and trade restrictions
United Kingdom
As of April 2008, the British government added swords with a curved blade of 50 cm (20 in.) or over in length ("the length of the blade shall be the straight line distance from the top of the handle to the tip of the blade") to the Offensive Weapons Order.[33] This ban was a response to reports that Samurai swords were used in more than 80 attacks and 4 killings over the 4 preceding years.[34] Those who violate the ban would be jailed up to six months and charged a fine of £5,000. Martial arts practitioners, historical re-enactors and people currently possessing such swords may still own them. The sword can also be legal provided it was made in Japan before 1954, or was made using traditional sword making methods. It is also legal to buy if it can be classed as a 'martial artist's weapon'.[35] This ban applies to England, Wales, Scotland and Northern Ireland. This ban was amended in August 2008 to allow sale and ownership without license of 'traditional' hand-forged katana.
Ireland
Under the Firearms and offensive Weapons Act 1990 (offensive Weapons) (Amendment) Order 2009, katanas made post-1953 are illegal unless made by hand according to traditional methods
Ownership and trade restrictions
United Kingdom
As of April 2008, the British government added swords with a curved blade of 50 cm (20 in.) or over in length ("the length of the blade shall be the straight line distance from the top of the handle to the tip of the blade") to the Offensive Weapons Order.[33] This ban was a response to reports that Samurai swords were used in more than 80 attacks and 4 killings over the 4 preceding years.[34] Those who violate the ban would be jailed up to six months and charged a fine of £5,000. Martial arts practitioners, historical re-enactors and people currently possessing such swords may still own them. The sword can also be legal provided it was made in Japan before 1954, or was made using traditional sword making methods. It is also legal to buy if it can be classed as a 'martial artist's weapon'.[35] This ban applies to England, Wales, Scotland and Northern Ireland. This ban was amended in August 2008 to allow sale and ownership without license of 'traditional' hand-forged katana.
Ireland
Under the Firearms and offensive Weapons Act 1990 (offensive Weapons) (Amendment) Order 2009, katanas made post-1953 are illegal unless made by hand according to traditional methods
vraiment con...incroyable
Tout est banni ! 
Ca aide sans bon sens de bannir ! 
