Side note: I discovered that
until the late 20th/early 21st century, several hereditary titles were given seats on the House of Lords, including the Duke of Gloucester -- this means that the Emperor of Japan is a member of the House of Lords.
Since the Dissolution of the Monasteries, the Lords Temporal have been the most numerous group in the House of Lords. Unlike the Lords Spiritual, they may be publicly partisan, aligning themselves with one or another of the political parties that dominate the House of Commons. Publicly non-partisan Lords are called crossbenchers. Originally, the Lords Temporal included several hundred hereditary peers (that is, those whose peerages may be inherited), who ranked variously as dukes, marquesses, earls, viscounts, and barons (as well as Scottish Lords of Parliament). Such hereditary dignities can be created by the Crown; in modern times this is done on the advice of the Prime Minister of the day (except in the case of members of the Royal Family).
In 1999, the Labour government brought forward the House of Lords Act removing the right of several hundred hereditary peers to sit in the House. The Act provided a temporary measure that only 92 individuals may continue to sit in the Upper House by virtue of hereditary peerages.
Of these, two remain in the House of Lords because they hold royal offices connected with Parliament: the Earl Marshal and the Lord Great Chamberlain. Of the remaining 90 members of the House of Lords sitting by virtue of a hereditary peerage in the House of Lords, 14 are elected by the whole House and 74 are chosen by fellow hereditary peers in the House of Lords, grouped by party. This Act, included the Principality of Wales and the Earldom of Chester and removed all Royal Peers including the Duke of Edinburgh, Duke of York, Earl of Wessex, Duke of Gloucester and the Duke of Kent.
So, by this merit, Emperor Alexander I, Empress Elizabeth, Emperor Alexander II and Empress Akane shall all be sitting members of the British House of Lords operating by proxy of the family of Alexander's brother, Prince James, and his descendants, who sit as their retainers. Empress Akane's right to sit in the House of Lords would be revoked in 1999 by the Labour government, and the title would be mostly just a status symbol, that passes on to Noriko in 2008.