Jemean

Jemean is a mashup language (that is, a language designed by taking aspects of several natlangs (preferably of different language families) and combining them together), which takes its vocabulary and half its grammar from Japanese, and the phonology, morphology, and the other half of grammar from the Slavic branch of the Indo-European family (most notably Czech).

Setting
In all honesty, I have created this language for a potential story that I had in mind, which may or may not involve a kingdom inspired by those in tzarist Russia and feudal Japan. Other than that, there is little background to this conlang.

Phonology
Jemean may be written with either the Latin or Cyrillic alphabet.

Phonotactics + Orthography

 * In polyphthongs, the Cyrillic letter Ь can only be used after hard (non-palatalized) vowels, otherwise Й is used.
 * W is usually used in diphthongs and very rarely (if at all) as a stand-alone consonant.
 * Ś is the final form of Š, as is Ź of Ž.
 * The four soft vowels are usually written in the "J-Vowel" form, but can be exchanged for the diacritical version.
 * Ŋ/Ng is always used before G, Ħ, and K.
 * N(soft vowel) and Ň(hard vowel) are two distinct versions of the same sound. Do not confuse them!
 * R may be used as a vowel, e.g. krt (крт) - enemy
 * The letters Й, Ь, and Ҥ may not begin words.

Nouns
Nouns have two genders, masculine and feminine, and can be put into three categories, physical, ideological, and spiritual. Aside from the lack of plurals in the spiritual category, the categories are largely arbitrary.
 * Physical nouns refer to objects, people, materials, and other objects that are tangible. E.g. sešk (сэшк) - stone.
 * Ideological nouns refer to non-tangible nouns, like shapes, locations and sounds. E.g. jucú (юцӱ) - house.
 * Spiritual nouns refer to ideas, emotions, and non-sensory phenomena. This category does not have plurals. E.g. kasa (каса) - [self-]worth.

In regards to gender, masculine nouns usually end in a consonant, e, or o, while feminine nouns end in a, á, i, í, u, ú, or a diphthong ending in j. Exceptions exist, however, and will be marked in the dictionary with their correct gender, or with (m/f) if they can take either.

Plurals
Singular nouns follow the nominative-accusative alignment, and thus when used as agents, they retain their nominativity (subjecthood) in both transitive and intransitive clauses. Plurals, however, follow the ergative-absolutive alignment, and thus plural agents are the subjects of intransitive verbs and the objects of transitive verbs.

Declensions
Nouns decline by case, number and gender, along with the final letter of their dictionary (singular nominative) form. For all tables, the rule is to affix certain letters to the end to decline them. For example:
 * If the final letter is a consonant other than j, see Table 1.
 * If it is e or o, and the noun is singular, see Table 2a. If it is plural, drop the vowel, then see Table 2b.
 * If it is a, i, or u, and the noun is singular, see Table 3a. If it is plural, move that vowel to the next last vowel (i changes to j, u to w) or remove it if the next last vowel is [nearly] the same, then see Table 3b. If the final vowel is instead á, í, or ú, shorten that vowel so that it loses its accent, then check for number.
 * If it is j, drop it, then see Table 4. *If it is plural vocative feminine, move the vowel that was before j to the next last vowel (e/i -> j, o/u -> w) or remove it if the next last vowle is [nearly] the same.